WASHINGTON -- The Central Intelligence Agency has acknowledged that it did not provide the United Nations with information about 21 of the 105 sites in Iraq singled out by U.S. intelligence before the war as the most highly suspected of housing illicit weapons. The acknowledgment, in a Jan. 20 letter to Sen. Carl Levin (D-Mich.), contradicts public statements before the war by top Bush administration officials. Both CIA Director George Tenet and National Security Adviser Condoleezza Rice said the United States had briefed U.N. inspectors on all of the sites identified as "high value and moderate value" in the weapons...