Highlight: In 1953, the Soviet Union publicly acknowledged it had tested a hydrogen bomb.

In 1866, President Andrew Johnson formally declared the Civil War over, months after fighting had stopped.

In 1910, a series of forest fires swept through parts of Idaho, Montana and Washington, killing at least 85 people and burning some 3 million acres.

In 1914, German forces occupied Brussels, Belgium, during World War I.

In 1940, during World War II, British Prime Minister Winston Churchill paid tribute to the Royal Air Force before the House of Commons, saying, “Never in the field of human conflict was so much owed by so many to so few.” Exiled Communist revolutionary Leon Trotsky was assassinated in Coyoacan, Mexico by Ramon Mercader. (Trotsky died the next day.)

In 1964, President Lyndon B. Johnson signed the Economic Opportunity Act, a nearly $1 billion anti-poverty measure.

In 1968, the Soviet Union and other Warsaw Pact nations began invading Czechoslovakia to crush the “Prague Spring” liberalization drive.

In 1977, the United States launched Voyager 2, an unmanned spacecraft carrying a 12-inch, gold-plated copper phonograph record containing images, greetings in dozens of languages, samples of music and sounds of nature.

In 1986, postal employee Patrick Henry Sherrill went on a deadly rampage at a post office in Edmond, Oklahoma, shooting 14 fellow workers to death before killing himself.

In 1988, a cease-fire in the war between Iraq and Iran went into effect.

In 1989, entertainment executive Jose Menendez and his wife, Kitty, were shot to death in their Beverly Hills mansion by their sons, Lyle and Erik.

In 2000, Tiger Woods won the PGA Championship in a playoff over Bob May, becoming the first player since Ben Hogan in 1953 to win three majors in one year.

Ten years ago: A Spanish jetliner crashed during takeoff from Madrid, killing 154 people; 18 survived. Secretary of State Condoleezza Rice and Polish Foreign Minister Radek Sikorski signed a deal to put a U.S. missile defense base in Poland. In Beijing, Usain Bolt of Jamaica broke the world record by winning the 200 meters in 19.30 seconds. U.S. Rep. Stephanie Tubbs Jones, the first black woman to represent Ohio in Congress, died in Cleveland at age 58.

Five years ago: A Pakistani court indicted former president and army chief Pervez Musharraf on murder charges stemming from the assassination of Prime Minister Benazir Bhutto. Qatar-based Al-Jazeera Media Network launched its U.S. cable news outlet, Al-Jazeera America. Crime novelist Elmore Leonard, 87, died in Bloomfield Township, Michigan.

One year ago: Actor, comic and longtime telethon host Jerry Lewis died of heart disease in Las Vegas at the age of 91.