An exhibition underscoring the misery inflicted on Hiroshima and Nagasaki by the U.S. atomic bombings in 1945 has gotten underway in Washington for the first time in 20 years.

Two survivors pleaded for efforts toward the abolition of nuclear weapons before some 150 people who attended the opening ceremony Saturday for the Atomic Bomb Exhibition at the American University Museum, which will run through Aug. 16.

Photos displaying the horror of the bombings and clothes burned by the heat of the atomic blasts are among the items exhibited.