Adlai E. Stevenson, U.S. Ambassador to the United Nations, is shown in the General Assembly chamber of the U.N. in New York City in this Feb. 10, 1965 photo. President Kennedy sent Stevenson to the U.N. where he showed aerial photographs of launching sites for intermediate range missiles in Cuba during an emergency session of the U.N. Security Council Oct. 25, 1965 at the height of the Cuban Missile Crisis. Photographs of mobile biological weapons installations and transcripts of overheard Iraqi conversations are part of the evidence Secretary of State Colin Powell will present Wednesday, Feb. 5, 2003 to convince allies that Iraqi President Saddam Hussein has potent weapons arsenals and is defying U.N. disarmament demands, an administration official said Monday, Feb. 3, 2003. (AP Photo)