Event:
NFL Chicago Cardinals and Pittsburgh Steelers merge (dissolves on Dec 3)
More Notable Events on April 21:
1995 FBI arrested Timothy McVeigh and charge him with Oklahoma City bombing
1986 Geraldo Rivera opens Al Capone's vault on TV and finds nothing
1963 Beatles meet Rolling Stones for 1st time
1948 1st Polaroid camera was sold in US
1862 Congress establishes U.S. Mint in Denver, Colorado
