1992: An underground methane gas explosion at the Westray coal mine in Nova Scotia kills all 26 miners who are underground. It’s the worst mining disaster in Canada since the cave-in of the Springhill coal mine in 1958, which claimed the lives of 75 miners.
1974: The House of Representatives Judiciary Committee opens impeachment hearings against President Richard Nixon, and votes to impeach him on three counts on July 30. The impeachment is the result of the scandal involving the bungled burglary of the offices of the Democratic National Committee in the Watergate apartment complex in 1972.
1955: West Germany formally joins the North Atlantic Treaty Organization (NATO), a mutual defense group aimed at containing Soviet expansion in Europe. This action marks the final step of West Germany’s integration into the Western European defense system.