Conversation so far:
when were the atomic bombs dropped on hiroshima and nagasaki
The United States detonated two nuclear weapons over the Japanese cities of Hiroshima and Nagasaki on August 6 and 9, 1945.
how many people were killed in the atomic bombings of hiroshima and nagasaki
The atomic bombings of Hiroshima and Nagasaki killed between 129,000 and 226,000 people.
what was the atomic bomb dropped on hiroshima called
Little Boy was the codename for the type of atomic bomb dropped on the Japanese city of Hiroshima on 6 August 1945 during World War II.

Question: how about the second one
Self-contained rewrite: what was the atomic bomb dropped on nagasaki called