<human>:  When did the first atomic bombs get dropped?
<bot>: The first atomic bombs were dropped on Hiroshima and Nagasaki in 1945. The first atomic bomb was called the "Little Boy" and was dropped on Hiroshima, Japan. The second atomic bomb was called the "Fat Man" and was dropped on Nagasaki, Japan. Both bombs had plutonium as their main ingredient, which was extracted from uranium ore.