The Central Air Force Museum in Monino at the site of Monino Airfield 40 km east of Moscow, Russia, is one of the world's largest aviation museums, and the largest for Russian aircraft. 173 aircraft and 127 aircraft engines are on display, and the museum also features collections of weapons, instruments, uniforms (including captured U2 pilot Gary Powers' uniform), other Cold War-era US spy equipment, artwork, and other air-related items. A library containing books, films, and photos is also accessible to visitors. Tours are given by ex-pilots.