Czechoslovakia, in November 1989. The popular uprising a week
after a fall of the Berlin Wall led to the bloodless overthrow
of the Communist government.
2. The number of
dust particles in an air sample.
3. Football was the
game, and Army and Navy were the teams playing at Municipal
Stadium in Philadelphia on December 7, 1963.
4. The U.S. Mint
in Philadelphia. That city was serving as the U.S. capital in
1792 when Congress passes the Coinage Act, authorizing the building's
5. A spongy black
fungus that causes corn kernels to swell.