Kimberly Dozier

MOGADISHU, Somalia -- The same U.S. Navy SEAL unit that killed Osama bin Laden parachuted into Somalia under cover of darkness early Wednesday and crept up to an outdoor camp where an American woman and Danish man were being held hostage. Soon, nine kidnappers were dead and both hostages were freed.

McLEAN, Va. -- In an anonymous industrial park in Virginia, in an unassuming brick building, the CIA is following tweets -- up to 5 million a day.

At the agency's Open Source Center, a team known affectionately as the "vengeful librarians" also pores over Facebook, newspapers, TV news channels, local radio stations, Internet chat rooms -- anything overseas that anyone can access and contribute to openly.

From Arabic to Mandarin Chinese, from an angry tweet to a thoughtful blog, the analysts gather the information, often in native tongue. They cross-reference it with the local newspaper or a clandestinely intercepted phone conversation. From there, they build a picture sought by the highest levels at the White House, giving a real-time peek, for example, at the mood of a region after the Navy SEAL raid that killed Osama bin Laden or perhaps a prediction of which Mideast nation seems ripe for revolt.

WASHINGTON -- An American-born cleric killed in Yemen played a "significant operational role" in plotting and inspiring attacks on the United States, U.S. officials said Friday, as they disclosed detailed intelligence to justify the killing of a U.S. citizen.

Anwar al-Awlaki was killed early Friday in a strike on his convoy carried out by a joint operation of the CIA and the U.S. Joint Special Operations Command, according to counterterrorism officials. Al-Awlaki had been under observations for three weeks while they waited for the right opportunity to strike.

WASHINGTON -- Al-Qaida may have sent American terrorists or men carrying U.S. travel documents to launch an attack on Washington or New York to coincide with memorials marking the 10th anniversary of 9/11, government officials say.

One U.S. official says al-Qaida dispatched three men, at least two of whom could be U.S. citizens, to detonate a car bomb in one of the cities. Should that mission prove impossible, the attackers have been told to simply cause as much destruction as they can.

WASHINGTON — U.S. officials said Thursday they were investigating a credible but unconfirmed threat that al-Qaida was planning to use a car bomb to target bridges or tunnels in New York City or Washington to coincide with the 10th anniversary of the Sept. 11 attacks, the first tip of an “active plot” around that date.