In 1867, President Andrew Johnson sparked a move to impeach him as he defied Congress by suspending Secretary of War Edwin M. Stanton, with whom he had clashed over Reconstruction policies. (Johnson was acquitted by the Senate.)

In 1898, fighting in the Spanish-American War came to an end.

In 1953, the Soviet Union conducted a secret test of its first hydrogen bomb.

In 1960, the first balloon communications satellite — the Echo 1 — was launched by the United States from Cape Canaveral.

In 1977, the space shuttle Enterprise passed its first solo flight test by taking off atop a Boeing 747, separating, then touching down in California’s Mojave Desert.

In 1981, IBM introduced its first personal computer, the model 5150, at a press conference in New York.

In 1985, the world’s worst single-aircraft disaster occurred as a crippled Japan Airlines Boeing 747 on a domestic flight crashed into a mountain, killing 520 people. (Four people survived.)

In 1992, the United States, Mexico and Canada announced they had concluded the North American Free Trade Agreement.

In 2007, A gunman opened fire in the sanctuary of a southwest Missouri church, killing a pastor and two worshippers. (A suspect later pleaded guilty to three counts of murder and four counts of assault, and received three life sentences without parole, plus four 30-year sentences for the assaults.)