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Former Secretary of State Colin Powell talks about the ramifications of Osama bin Laden's death. And amid a shakeup in the country's national security team, guests discuss the changing roles of the national security community and how the news is playing out in Washington.

Analysts say the poll just confirms what the Arab uprisings in Egypt and Tunisia had already proven.

The U.S. raid that killed Osama bin Laden in a heavily fortified compound in Abottobad, Pakistan was the final act of an intelligence and military operation that began in the summer of 2010. Bin Laden's death will have significant ramifications for the operations and future of al Qaida.

The entire operation on the compound in Abbottabad, Pakistan, lasted just 40 minutes. Here, look at how the events unfolded.

"When we started," says Susan Stamberg, "there was war in Vietnam, demonstrations against that war, the voting age was lowered to 18, the Beatles had broken up and in the air ... as well as on our air ... a sweetly notable absence of irony."

The recent destruction and loss of lives across the United States echoes another era more than 100 years ago — a time when humans began trying to outwit and even defeat tornadoes. After a deadly 1896 tornado in St. Louis, one proposal called for building large walls near big cities to protect them from twisters.

But the demolition project did nothing to ease the risk of more trouble downstream, where the mighty river is expected to rise to its highest levels since the 1920s in some parts of Tennessee, Mississippi and Louisiana. Authorities were considering using techniques similar to the Missouri project to divert on oncoming rush of water.

Like the "birthers" who try to raise questions about President Obama's citizenship and the "truthers" who have conspiracy theories about the Sept. 11 terrorist attacks, the "deathers" are suspicious about bin Laden's death.

Osama bin Laden's death continues dominating global headlines. In the U.S., politicians are considering how this event might affect them and their parties. Host Michel Martin breaks down the political implications of the raid on bin Laden with Atlanta Journal Constitution's Cynthia Tucker and U.S. News and World Report's Mary Kate Cary.

The recession is rebounding and large companies are feeling optimistic about their futures. But recent reports say small businesses have become more pessimistic. Host Michel Martin speaks with money coach Alvin Hall about what's behind these contrasting opinions and how small businesses can survive.