Mandatory screening of airline passengers went into effect in the United States.
Salt Lake City Airport.
The Canadian Parliament unanimously condemned the 1972 "Christmas" bombing of North Vietnam by the United States. This infuriated President Nixon, who was otherwise busy with an Executive Order designed to reorganize the Federal Government and cut the number of White House staff, 4,000, in half.
Mali and Niger broke diplomatic relations with Israel and the Netherlands recognized German Democratic Republic, i.e., East Germany.
The Republic of Ireland amended its constitution removing the "special position" of the Catholic Church, making reference to other religions present in Ireland, and reducing the voting age from 21 to 18. The special position had been resisted by the Catholic Church at the onset of its inclusion but included due to the insistence and influence of Éamon de Valera.
Joe Biden was sworn in as Senator from Delaware at a chapel at the Wilmington, Delaware hospital where one of his sons was hospitalized following a December 18 accident that killed Biden's first wife and his daughter.
Aerosmith released its first album, which was called Aerosmith. On the same day, Bruce Springsteen released his famous debut studio album, Greetings from Ashbury Park, N.J. Both albums showed an evolution away from the Rock & Roll of the 1960s.