Three survivors of the U.S. atomic bombings of Hiroshima and Nagasaki visited the museum displaying the Enola Gay B-29 bomber on Friday and urged U.S. President George W. Bush to visit the two cities.

Their visit came two days before the 61st anniversary of the use of an atomic bomb on Hiroshima on Aug. 6, 1945. It was dropped by the Enola Gay.

The second bomb hit Nagasaki three days later.

The three survivors told a news conference of their experiences and called for the abolition of nuclear weapons. They spoke in front of the Steven F. Udvar-Hazy Center, an annex of the Smithsonian's National Air and Space Museum in Washington. The center is in Virginia on the outskirts of the U.S capital.