As Bastille Day celebrants packed the streets watching fireworks in Nice, France, a large truck broke through barriers and accelerated into the crowd, driving for over a mile until he jumped out of the cab and started shooting. He was killed by police. The death count stands at 75, with over 100 injured.
Authorities are calling this a terrorist attack.
UPDATE: The death toll has risen to 84, with many more in critical condition. Two Americans are among the dead. The killer has been identified as Mohamed Lahouaiej Bouhlel. See this.