On this date:

In 1900, international forces, including U.S. Marines, entered Beijing to put down the Boxer Rebellion, which was aimed at purging China of foreign influence.

In 1935, President Franklin D. Roosevelt signed the Social Security Act into law.

In 1941, President Franklin D. Roosevelt and British Prime Minister Winston Churchill issued the Atlantic Charter, a statement of principles that renounced aggression.

In 1948, the Summer Olympics in London ended; they were the first Olympic games held since 1936.

In 1969, British troops went to Northern Ireland to intervene in sectarian violence between Protestants and Roman Catholics.

In 1973, U.S. bombing of Cambodia came to a halt.

In 1980, actress-model Dorothy Stratten, 20, was shot to death by her estranged husband and manager, Paul Snider, who then killed himself.

In 1992, the White House announced that the Pentagon would begin emergency airlifts of food to Somalia to alleviate mass deaths by starvation.

In 1997, an unrepentant Timothy McVeigh was formally sentenced to death for the Oklahoma City bombing.

In 2003, a huge blackout hit the northeastern United States and part of Canada; 50 million people lost power.

In 2008, President George W. Bush signed consumersafety legislation that banned lead from children’s toys, imposing the toughest standard in the world.

In 2017, under pressure from right and left, President Donald Trump condemned white supremacist groups by name, declaring them to be “repugnant to everything that we hold dear as Americans.” The CEO of Merck, the nation’s third-largest pharmaceutical company, resigned from a federal advisory council, citing Trump’s failure to explicitly condemn white nationalists who marched in Charlottesville, Virginia.