On March 24, 1882, German scientist Robert Koch announced in Berlin that he discovered the bacillus responsible for tuberculosis.

In 1921, the Women’s Olympiad, the first international women’s sporting event, began in Monte Carlo, Monaco.

In 1989, the supertanker Exxon Valdez ran aground on a reef in Alaska’s Prince William Sound and began leaking an estimated 11 million gallons of crude oil.

In 1999, NATO launched airstrikes against Yugoslavia, marking the first time in its 50-year existence that the military alliance attacked a sovereign country.

In 2015, Germanwings Flight 9525, an Airbus A320, crashed into the French Alps, killing all 150 people on board; investigators later determined that the jetliner was deliberately downed by the 27-year-old co-pilot, Andreas Lubitz.