Daniel Ellsberg, the government analyst and whistleblower who leaked the Pentagon Papers in 1971, has died at 92. Ellsberg had announced in February that he was terminally ill with pancreatic cancer. A letter released by his family says he died Friday morning. The leak of the 7,000-page Defense Department study revealed that officials had doubts about U.S. strategy in Vietnam, fueling the debate on U.S. involvement in southeast Asia. President Richard Nixon became so angry about the leaked material that he approved illegal actions which helped lead to his resignation in 1974. Ellsberg later wa...