Lieutenant-General Henry Obering, director of the U.S. Missile Defense Agency (R), and Eric Edelman, Under Secretary of Defense for Policy (L), answer questions during a news conference at the U.S embassy in Warsaw April 18, 2007. The United States is ready to allow Russian experts to inspect a missile defence site likely to be placed in Poland to convince Moscow it poses no threat to its interests, a senior U.S. official said. REUTERS/Katarina Stoltz (POLAND)