What was the name of the B-29 bomber that dropped the first atomic bomb on Hiroshima in 1945?
Who became the first woman to serve as a justice on the U.S. Supreme Court, confirmed in 1981?
What Babylonian legal code is one of the oldest surviving sets of written laws?
What was the name of the secret US research program that developed the first atomic bombs?
Which African nation held off European colonization apart from a brief Italian occupation in the 1930s?