Osama Bin Laden is Dead!

Osama bin Laden, the mastermind behind the Sept. 11, 2001, terror attacks that killed thousands of Americans, was slain in his luxury hideout in Pakistan early Monday in a firefight with U.S. forces, ending a manhunt that spanned a frustrating decade.

"Justice has been done," President Barack Obama declared as crowds formed outside the White House to celebrate. Many sang "The Star-Spangled Banner" and "We Are the Champions," NBC News reported.

Hundreds more waved American flags at ground zero in New York — where the twin towers that once stood as symbols of American economic power were brought down by bin Laden's hijackers 10 years ago.