1971

Hundreds of Vietnam War veterans opposed to the conflict protested by tossing their medals and ribbons over a wire fence constructed in front of the U.S. Capitol.

1988

A federal ban on smoking during domestic airline flights of two hours or less went into effect.

2018

Alek Minassian plowed a rental van into crowds of pedestrians in Toronto, killing 10 people and leaving 16 others hurt. (He was later convicted of 10 counts of murder and sentenced to life.)