A Buddhist monk, left, and shinto priest pray in front of the cenotaph dedicated to the victims of atomic bombing at the Peace Memorial Park in Hiroshima, western Japan Sunday, Aug. 5, 2012. Hiroshima will mark the 67th anniversary of the atomic bombing on Aug 6.(AP Photo/Itsuo Inouye)

Aerial view of the Japanese city of Hiroshima after an atomic bomb was dropped on August 6, 1945.

Japan, Hiroshima, Genbaku dome

August 6, 2011, Hiroshima, Japan - Against the backdrop of the A-bomb dome, doves are released to highlight a memorial ceremony at Peace Memorial Park in Hiroshima on Saturday, August 6, 2011. ....Japan observed the 66th anniversary of the atomic bombing with a moment of silence and the release of doves in a memorial ceremony as the nation struggles to put a different kind of nuclear disaster under control at the crippled power plant in northeast. The worlds first A-bomb destroyed most of this western industrial city, killing as many as 140,000 people in the summer of 1945. A second atomic bombing Aug. 9 that year in Nagasaki killed tens of thousands more and prompted the Japanese to surrender. (Photo by Natsuki Sakai/AFLO [3615] -mis-

Japan, Hiroshima Peace Memorial Park, memorial cenotaph

PHOTO: EAST NEWS DZIECI W HIROSZIMIE PO WYBUCHU BOMBY ATOMOWEJ 1945

Japanese girls view a peace memorial in front of the Industry Hall in Hiroshima, Japan on August 8, 1951. The wrecked hall was near the center of the atomic bomb blast six years ago (on August 6) which razed most of the city. The Japanese with U.S. help have rebuilt the city. (AP Photo)

A sign at a Japanese roadside kiosk advertises in English broken vessels and photographs of the Hiroshima atomic bomb in the aftermath of World War II, Aug. 5, 1949. (AP Photo)

Workmen rebuilding the city, pause during their work for a 30 second silent prayer in Hiroshima, Japan, on August 8, 1947 for those who died in the bombing. (AP Photo/Charles P. Gorry)

Aerial view of the city one year after the atomic bomb blast, shows some small amount of reconstruction amid much ruin in Hiroshima, Japan on July 20, 1946. Lack of building equipment and materials is given as reason for lack of more building. (AP Photo/Charles P. Gorry)

The Hiroshima Auditorium and Municipal Building show heavy structural damage nearly a year after the atomic bombing of this Japanese city, seen June 26, 1946. (AP Photo)

This photo shows the total destruction of the city of Hiroshima, Japan, on April 1, 1946. The atomic bomb known as

Maj. Thomas Ferebee, left, of Mocksville, N.C., and Capt. Kermit Beahan, right, of Houston, Texas, talk at a hotel in Washington, D.C., on Feb. 6, 1946. Ferebee dropped the atomic bomb over Hiroshima, and Beahan dropped the bomb over Nagasaki. They are summoned to the nation's capital from Roswell Field, N.M., to prepare for the joint Army-Navy atomic bomb testing on target warships at Bikini atoll next May. (AP Photo)

An unidentified man stands next to a tiled fireplace where a house once stood in Hiroshima, Japan, on Sept. 7, 1945. The vast ruin is a result of

A man looks over the caved in ruins of what was an air raid shelter in atom bomb-ravaged Hiroshima, Sept. 7, 1945. (AP Photo)

A man looks through two pillars -- all that remain of a once luxurious house in Hiroshima, Sept. 7, 1945. (AP Photo/ACME/Stanley Troutman)

This is an aerial view of the remains of the city of Hiroshima, Japan, Sept. 5, 1945, one month after the atomic bomb was dropped on it. (AP Photo/Max Desfor)

This is a general view at the burn-razed cityscape of Hiroshima, on September 5, 1945, one month after the first atomic bomb ever used in warfare was dropped by the U.S. over the Japanese city. (AP Photo/Max Desfor)

This desolated area, with only some buildings standing here and there is what was left of Hiroshima, Japan, Sept. 3, 1945 after the first atomic bomb was dropped. (AP Photo)

This is a view of Hiroshima, Sept. 3, 1945, showing total destruction resulting from the dropping of the atomic bomb on August 6. (AP Photo/U.S. Air Force)