U.S.-Russia nuclear arms treaty
The U.S. Senate ratified the new Strategic Arms Reduction Treaty Dec. 22, 2010, with the intent of leveling the nuclear arms playing field between the U.S. and Russia. The treaty allows U.S. and Russian officials to conduct as many as 10 "type 1" inspections, which focus on strategic systems, such as intercontinental ballistic missiles, submarines and bombers, including the B-52 Stratofortess pictured here. The agreement also allows for up to eight "type 2" inspections, which cover storage sites, test ranges and other operations. (U.S. Air Force photo/Staff Sgt. Kamaile O. Long)