WASHINGTON, May 16 (Reuters) - Following is a timeline of intelligence information provided to U.S. President George W. Bush and other officials about possible threats to U.S. targets before Sept. 11 as disclosed on Thursday by the White House. U.S. National Security Adviser Condoleezza Rice gave the chronology as the White House defended itself against charges it may not have done enough to prevent the Sept. 11 attacks and questions about why it did not disclose Bush's Aug. 6 briefing on the possibility of hijackings by Osama bin Laden's network. December 2000 - U.S. intelligence community begins to report increase...