Osama bin Laden was killed in Pakistan and his body has been recovered by U.S. authorities, U.S. officials said Sunday night. President Barack Obama was to make the dramatic announcement shortly in a hastily called, late-night appearance at the White House: That the mastermind of the September 11, 2001, attacks was killed in an American-led operation in a mansion outside Islamabad. It is a major accomplishment for Obama and his national security team, after many Americans had given up hope of ever finding bin Laden. A crowd gathered outside the White House to celebrate, chanting, "USA, USA." Obama's predecessor, George W. Bush, had repeatedly vowed to bring bin Laden to justice "dead or alive" for the September 11, 2001, attacks on New York and Washington that killed nearly 3,000 people, but never did before leaving office in early 2009. U.S. officials said that after searching in vain for the al Qaeda leader since he disappeared in Afghanistan in late 2001, the...