Osama bin Laden is dead

President Obama announced the killing of Osama bin Laden on Sunday. (Photo courtesy: New York Times)

Mr. Obama spoke in a dramatic late-night appearance in the East Room of the White House. (Photo courtesy: New York Times)

Osama bin Laden in Afghanistan in 1998. (Photo courtesy: New York Times)

Osama bin Laden, in 1988, was killled in a confrontation with American forces. (Photo courtesy: New York Times)

A crowd celebrated outside the White House on Sunday. (Photo courtesy: New York Times)

Marines in Afghanistan watch President Obama&#039;s speech. (Photo courtesy: New York Times)

In the shadow of the World Trade Center site, the news of bin Laden&#039;s killing spread. (Photo courtesy: New York Times)

In Times Square, the mood on the street was jubilant. (Photo courtesy: New York Times)

The Sept. 11, 2001, attack on the World Trade Center in New York. (Photo courtesy: New York Times)