On this day, Dec. 6

1790 Congress moved to Philadelphia from New York.

1865 The 13th Amendment to the U.S. Constitution, abolishing slavery, was ratified as Georgia became the 27th state to endorse it.

1917 Some 2,000 people were killed when an explosives-laden French cargo ship, the Mont Blanc, collided with the Norwegian vessel Imo at the harbor in Halifax, Nova Scotia, setting off a blast that devastated the Canadian city.

1923 A presidential address was broadcast on radio for the first time as Calvin Coolidge spoke to a joint session of Congress.

1947 Everglades National Park in Florida was dedicated by President Harry S. Truman.

1957 America’s first attempt at putting a satellite into orbit failed as Vanguard TV3 rose about four feet off a Cape Canaveral launch pad before crashing down and exploding.

1962 Thirty-seven coal miners were killed in an explosion at the Robena No. 3 Mine operated by U.S. Steel in Carmichaels, Pa.

1969 A free concert by The Rolling Stones at the Altamont Speedway in Alameda County, California, was marred by the deaths of four people, including one who was stabbed by a Hell’s Angel.

1973 House minority leader Gerald R. Ford was sworn in as vice president, succeeding Spiro T. Agnew.

1998 In Venezuela, former Lt. Col. Hugo Chavez, who had staged a bloody coup attempt against the government six years earlier, was elected president.

2017 President Donald Trump declared Jerusalem to be Israel’s capital, defying warnings from the Palestinians and others around the world that he would be destroying hopes for Mideast peace.

2018 Kevin Hart announced that he had stepped down as Oscars host following an Lindsay outcry over anti-gay tweets and comments he had made in the past.

2021 The Justice Department said it was ending its investigation into the 1955 lynching of the Black teenager Emmett Till, who was killed after witnesses said he whistled at a white woman in Mississippi.

2022 Democratic Sen. Raphael Warnock defeated Republican challenger Herschel Walker in a Georgia runoff election.

Today’s birthdays: Comedy performer

David Ossman, 87. Actor Patrick Bauchau,

85. Country singer Helen Cornelius, 82.

Actor James Naughton, 78. Former Transportation Secretary Ray LaHood, 78. R&B singer Frankie Beverly (Maze), 77. Former

Sen. Don Nickles, R-Okla., 75.