Newly declassified photo of the Bomb.

On August 6, 1945, the United States became the first and only
nation to use atomic weaponry during wartime when a B-29
bomber, dubbed the “Enola Gay,” dropped an atomic bomb
on the Japanese city of Hiroshima. Approximately 80,000
people are killed as a direct result of the blast, and another
35,000 are injured. At least another 60,000 would be dead by
the end of the year from the effects of the fallout.

Though the dropping of the atomic bomb on Japan marked the
end of World War II, many historians argue that it also ignited
the Cold War.