1912

Boston’s Fenway Park, now the oldest active stadium in Major League Baseball, hosted its first official baseball game. 1914

Militia and Colorado National Guard members opened fire on an encampment of striking coal miners and their families in Ludlow, Colorado; at least 19 people in the camp, including 12 children, and one National Guard member were killed.

1972

Apollo 16’s lunar module, with astronauts John W. Young and Charles M. Duke Jr., landed on the moon.

1999

Two students shot and killed 12 students and one teacher and injured 23 others at Columbine High near Denver.