FILE - In this Friday, July 14, 1961 file photo, Major Yuri Gagarin, the Russian cosmonaut, smiles as he leaves Buckingham Palace in London, United Kingdom, after lunch with Queen Elizabeth II. He is visiting Britain in connection with the soviet exhibition in London. The successful one-orbit flight on April 12, 1961 made the 27-year-old Gagarin a national hero and cemented Soviet supremacy in space until the United States put a man on the moon more than eight years later. (AP Photo/Brian Calvert, File)