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sexta-feira, 28 de setembro de 2012

Mars rover Curiosity finds signs of ancient stream

AP  ALICIA CHANGLOS ANGELES -- The NASA rover Curiosity has beamed back pictures of bedrock that suggest a fast-moving stream, possibly waist-deep, once flowed on Mars - a find that the mission's chief scientist called exciting.

There have been previous signs that water existed on the red planet long ago, but the images released Thursday showing pebbles rounded off, likely by water, offered the most convincing evidence so far of an ancient streambed.

There was "a vigorous flow on the surface of Mars," said chief scientist John Grotzinger of the California Institute of Technology. "We're really excited about this."

The discovery did not come as a complete surprise. NASA decided to plunk Curiosity down inside Gale Crater near the Martian equator because photos from space hinted that the spot possessed a watery past. The six-wheeled rover safely landed Aug. 5 after a nail-biting plunge through the Martian atmosphere. It's on a two-year, $2.5 billion mission to study whether the Martian environment could have been favorable for microbial life.

Present day Mars is a frozen desert with no hint of water on its radiation-scarred surface, but geological studies of rocks by previous missions suggest the planet was warmer and wetter once upon a time.

The latest evidence came from photos that Curiosity took revealing rounded pebbles and gravel - a sign that the rocks were transported long distances by water and smoothed out.

The size of the rocks - ranging from a sand grain to a golf ball - indicates that they could not have been carried by wind, said mission scientist Rebecca Williams of the Planetary Science Institute in Tucson, Arizona.

Though Curiosity did not use its high-tech instruments to drill into the rocks or analyze their chemical makeup, Grotzinger said scientists were sure that water played a role based on just studying the pictures.

It's unclear how long the water persisted on the surface, but it easily could have lasted "thousands to millions of years," said mission scientist Bill Dietrich of the University of California, Berkeley.

Curiosity chanced upon the dried-up streambed while driving to Glenelg, an intriguing spot where three types of terrain meet. Its ultimate destination is Mount Sharp, a mountain rising from the center of crater floor, but it was not expected to travel there until the end of the year.

Finding past water is a first step toward learning whether the environment could have supported microbes. Scientists generally agree that besides water and an energy source such as the sun, organic carbon is a necessary prerequisite for life.

While an ancient streambed holds promise as a potentially habitable environment, scientists don't think it's a good place to preserve the carbon building blocks of life. That's why the rover will continue its trek to the foothills of Mount Sharp where there's a better chance of finding organics.

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quarta-feira, 4 de janeiro de 2012

Obama signs pipeline safety, airport security laws

AP  Eyewitness NewsWASHINGTON -- President Barack Obama has signed legislation to toughen oil and gas pipeline regulations and another to ease airport security procedures for members of the military on official travel.

The president signed the legislation Tuesday as part of a post-holiday, back-to-business day that included approval of several other measures approved by Congress late last year.

The pipeline law aims to close gaps in federal safety regulations made apparent by a fatal gas pipeline break near San Francisco in 2010.

The airport security law will allow expedited screening for service members and accompanying family. Military travelers would have to be in uniform and would have to present their orders to benefit from the faster screening process.

The president also signed a bill authorizing spending on intelligence community operations.

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barack obama, politics & elections

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segunda-feira, 2 de janeiro de 2012

Obama signs defense bill despite 'reservations'

AP  Eyewitness NewsHONOLULU -- President Barack Obama signed a wide-ranging defense bill into law Saturday despite having "serious reservations" about provisions that regulate the detention, interrogation and prosecution of suspected terrorists.

The bill also applies penalties against Iran's central bank in an effort to hamper Tehran's ability to fund its nuclear enrichment program. The Obama administration is looking to soften the impact of those penalties because of concerns that they could lead to a spike in global oil prices or cause economic hardship on U.S.

allies that import petroleum from Iran.

In a statement accompanying his signature, the president chastised some lawmakers for what he contended was their attempts to use the bill to restrict the ability of counterterrorism officials to protect the country.

Administration officials said Obama was only signing the measure because Congress made minimally acceptable changes that no longer challenged the president's terrorism-fighting ability.

"Moving forward, my administration will interpret and implement the provisions described below in a manner that best preserves the flexibility on which our safety depends and upholds the values on which this country was founded," Obama said in the signing statement.

Signing statements allow presidents to raise constitutional objections to circumvent Congress' intent. During his campaign for the White House, Obama criticized President George W. Bush's use of signing statements and promised to make his application of the tool more transparent.

Obama's signature caps months of wrangling over how to handle captured terrorist suspects without violating Americans' constitutional rights. The White House initially threatened to veto the legislation but dropped the warning after Congress made last-minute changes.

Among the changes the administration secured was striking a provision that would have eliminated executive branch authority to use civilian courts for trying terrorism cases against foreign nationals.

The new law now requires military custody for any suspect who is a member of al-Qaida or "associated forces" and involved in planning or attempting to carry out an attack on the United States or its coalition partners. The president or a designated subordinate may waive the military custody requirement by certifying to Congress that such a move is in the interest of national security.

The administration also pushed Congress to change a provision that would have denied U.S. citizens suspected of terrorism the right to trial and could have subjected them to indefinite detention. Lawmakers eventually dropped the military custody requirement for U.S. citizens or lawful U.S. residents.

"My administration will not authorize the indefinite military detention without trial of American citizens," Obama said in the signing statement. "Indeed, I believe that doing so would break with our most important traditions and values as a nation."

Despite the changes, officials cited serious concerns that the law will complicate and could harm the investigation of terrorism cases.

For example, FBI Director Robert Mueller has said the measure would inhibit his bureau's ability to persuade suspected terrorists to cooperate immediately and provide critical intelligence. He told Congress it wasn't clear how agents should operate if they arrest someone covered by the military custody requirement but the nearest military facility is hundreds of miles away.

Other officials have said agents and prosecutors should not have to spend their time worrying about citizenship status and whether get a waiver while trying to thwart a terror attack.

The administration also raised concerns about an amendment in the bill that goes after foreign financial institutions that do business with Iran's central bank, barring them from opening or maintaining correspondent operations in the United States. It would apply to foreign central banks only for transactions that involve the sale or purchase of petroleum or petroleum products.

Officials worry that the penalties could lead to higher oil prices, damaging the U.S. economic recovery and hurting allies in Europe and Asia that purchase petroleum from Iran.

The penalties do not go into effect for six months. The president can waive them for national security reasons or if the country with jurisdiction over the foreign financial institution has significantly reduced its purchases of Iran oil.

The State Department has said the U.S. was looking at how to put them in place in a way that maximized the pressure on Iran, but meant minimal disruption to the U.S. and its allies.

This week, Iran warned that it may disrupt traffic in the Strait of Hormuz - a vital Persian Gulf waterway. But on Saturday, Tehran seemed to back off that threat when a commander of its Revolutionary Guard said such discussion is a thing of the past and "belongs to five years ago."

Iran also said Saturday that it had proposed a new round of talks on its nuclear program with the U.S. and other world powers.

The invitation would come after the U.N. has imposed four rounds of sanctions. Separately, the U.S. and the European Union have imposed their own tough economic and financial penalties.

The $662 billion bill authorizes money for military personnel, weapons systems, the wars in Afghanistan and Iraq and national security programs in the Energy Department for the fiscal year beginning Oct. 1.

The measure also freezes some $700 million in assistance until Pakistan comes up with a strategy to deal with improvised explosive devices.

Obama signed the bill in Hawaii, where he is vacationing with his family.

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domingo, 29 de maio de 2011

Obama, in Europe, signs Patriot Act extension

See it on TV? Check here.Patriot Act AP  By JIM ABRAMSWASHINGTON -- Minutes before a midnight deadline, President Barack Obama signed into law a four-year extension of post-Sept. 11 powers to search records and conduct roving wiretaps in pursuit of terrorists.

"It's an important tool for us to continue dealing with an ongoing terrorist threat," Obama said Friday after a meeting with French President Nicolas Sarkozy.

With Obama in France, the White House said the president used an autopen machine that holds a pen and signs his actual signature. It is only used with proper authorization of the president.

Congress sent the bill to the president with only hours to go on Thursday before the provisions expired at midnight. Votes taken in rapid succession in the Senate and House came after lawmakers rejected attempts to temper the law enforcement powers to ensure that individual liberties are not abused.

The Senate voted 72-23 for the legislation to renew three terrorism-fighting authorities. The House passed the measure 250-153 on an evening vote.

A short-term expiration would not have interrupted ongoing operations but would have barred the government from seeking warrants for new investigations.

Congress bumped up against the deadline mainly because of the stubborn resistance from a single senator, Republican freshman Rand Paul of Kentucky, who saw the terrorist-hunting powers as an abuse of privacy rights. Paul held up the final vote for several days while he demanded a chance to change the bill to diminish the government's ability to monitor individual actions.

The measure would add four years to the legal life of roving wiretaps, authorized for a person rather than a communications line or device; court-ordered searches of business records; and surveillance of non-American "lone wolf" suspects without confirmed ties to terrorist groups.

The roving wiretaps and access to business records are small parts of the USA Patriot Act enacted after the Sept. 11, 2001, attacks. But unlike most of the act, which is permanent law, those provisions must be renewed periodically because of concerns that they could be used to violate privacy rights. The same applies to the "lone wolf" provision, which was part of a 2004 intelligence law.

Paul argued that in the rush to meet the terrorist threat in 2001 Congress enacted a Patriot Act that tramples on individual liberties. He had some backing from liberal Democrats and civil liberties groups who have long contended the law gives the government authority to spy on innocent citizens.

Sen. Dick Durbin, D-Ill., said he voted for the act in 2001 "while ground zero was still burning." But "I soon realized it gave too much power to government without enough judicial and congressional oversight."

Sen. Mark Udall, D-Colo., said the provision on collecting business records can expose law-abiding citizens to government scrutiny. "If we cannot limit investigations to terrorism or other nefarious activities, where do they end?" he asked.

"The Patriot Act has been used improperly again and again by law enforcement to invade Americans' privacy and violate their constitutional rights," said Laura W. Murphy, director of the ACLU Washington legislative office.

Still, coming just a month after intelligence and military forces tracked down and killed Osama bin Laden, there was little appetite for tampering with the terrorism-fighting tools. These tools, said Senate Republican leader Mitch McConnell of Kentucky, "have kept us safe for nearly a decade and Americans today should be relieved and reassured to know that these programs will continue."

Intelligence officials have denied improper use of surveillance tools, and this week both FBI Director Robert Mueller and Director of National Intelligence James Clapper sent letters to congressional leaders warning of serious national security consequences if the provisions were allowed to lapse.

The Obama administration says that without the three authorities the FBI might not be able to obtain information on terrorist plotting inside the U.S. and that a terrorist who communicates using different cell phones and email accounts could escape timely surveillance.

"When the clock strikes midnight tomorrow, we would be giving terrorists the opportunity to plot attacks against our country, undetected," Senate Majority Leader Harry Reid said on the Senate floor Wednesday. In unusually personal criticism of a fellow senator, he warned that Paul, by blocking swift passage of the bill, "is threatening to take away the best tools we have for stopping them."

The nation itself is divided over the Patriot Act, as reflected in a Pew Research Center poll last February, before the killing of bin Laden, that found that 34 percent felt the law "goes too far and poses a threat to civil liberties. Some 42 percent considered it "a necessary tool that helps the government find terrorists." That was a slight turnaround from 2004 when 39 percent thought it went too far and 33 percent said it was necessary.

Paul, after complaining that Reid's remarks were "personally insulting," asked whether the nation "should have some rules that say before they come into your house, before they go into your banking records, that a judge should be asked for permission, that there should be judicial review? Do we want a lawless land?"

Paul agreed to let the bill go forward after he was given a vote on two amendments to rein in government surveillance powers. Both were soundly defeated. The more controversial, an amendment that would have restricted powers to obtain gun records in terrorist investigations, was defeated 85-10 after lawmakers received a letter from the National Rifle Association stating that it was not taking a position on the measure.

According to a senior Justice Department national security official testifying to Congress last March, the government has sought roving wiretap authority in about 20 cases a year between 2001 and 2010 and has sought warrants for business records less than 40 times a year, on average. The government has yet to use the lone wolf authority.

But the ACLU also points out that court approvals for business record access jumped from 21 in 2009 to 96 last year, and the organization contends the Patriot Act has blurred the line between investigations of actual terrorists and those not suspected of doing anything wrong.

Two Democratic critics of the Patriot Act, Sen. Ron Wyden of Oregon and Udall of Colorado, on Thursday extracted a promise from Senate Intelligence Committee chairman Dianne Feinstein, D-Calif., that she would hold hearings with intelligence and law enforcement officials on how the law is being carried out.

Wyden says that while there are numerous interpretations of how the Patriot Act works, the official government interpretation of the law remains classified. "A significant gap has developed now between what the public thinks the law says and what the government secretly claims it says," Wyden said.

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Associated Press writers Laurie Kellman and Pete Yost contributed to this report.

(Copyright ©2011 by The Associated Press. All Rights Reserved.)
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