1867

The United States took formal possession of Alaska from Russia, thus ensuring the U.S. access to the Pacific northern rim.

1898

The American flag was first raised in Puerto Rico, shortly before Spain formally relinquished control of the island to the U.S.

1972

Congress passed the Clean Water Act, overriding President Richard Nixon’s veto.

1977

Reggie Jackson hit three home runs in Game 6 of the World Series to lead the New York Yankees to an 8-4 victory over the Los Angeles Dodgers and another world championship.