Several thousand people gathered in Bahrain's capital of Manama on Tuesday as demonstrators renewed demands for the fall of the Sunni-dominated government. Jon Decker reports.

CBS News national security correspondent David Martin provides an update on the yacht hijacking off East Africa by Somali pirates, which ended with four Americans dead.

Office workers trapped under their collapsed buildings sent messages to the outside as rescuers with dogs scrambled to save them and dozens of others following a powerful earthquake that killed at least 65 in one of New Zealand's largest cities. (Feb. 22)

The first London 2012 Olympics venue - the cycling velodrome - has been officially unveiled 521 days before the games begin and slightly under the budget of 93 million pounds (150 million U.S.).

Two Iranian naval vessels entered the Suez Canal on Tuesday en route to Syria, officials said, the first time in three decades that Tehran has sent military ships through the strategic waterway. (Feb. 22)

Libya president Muammar Qaddafi is coming under fire from foreign diplomats after firing on his own citizens. Allen Pizzey reports.

David Cameron has become the first foreign leader to visit Egypt since the fall of President Mubarak.

U.N. Secretary General Ban Ki-Moon says he spoke extensively to Libyan leader Moammar Gadhafi, urging him to stop the violence against protestors in Tripoli and Benghazi, and respect human rights. (Feb. 22)

The latest from Libya following ferocious crackdowns.

Wall Street suffered its biggest percentage drop in six months as investors fear a spike in oil, sparked by tensions in Libya, will hurt the economic recovery, even as Saudi Arabia tried to soothe supply concerns.

Secretary of State Hillary Clinton says the U.S. strongly condemns the violence in Libya and elsewhere in the Middle East. She urges all leaders there to listen to demonstrators and act in the best interest of their citizens. (Feb. 22)

A professor on the crisis in Libya.

Tim Carney on unions, Libya

The Obama administration decries the bloodshed but some say it should do much more. CNN's Jill Dougherty reports.

The Libyan leader blames foreign powers for the current unrest.

Even many conservatives now believe that the Pentagon's budget can be cut without undermining American security.