Union forces moved in.

In 1897, the forerunner of the National PTA, the National Congress of Mothers, convened its first meeting in Washington.

In 1933, Newsweek magazine was first published under the title "News-Week."

In 1944, during World War II, U.S. forces invaded Eniwetok Atoll, encountering little initial resistance from Imperial Japanese troops. (The Americans secured the atoll less than a week later.)

In 1947, the Voice of America began broadcasting to the Soviet Union.

In 1968, the original Naismith Memorial Basketball Hall of Fame, located on the campus of Springfield College in Massachusetts, was opened to the public.

In 1972, President Richard M. Nixon departed the White House with his wife, Pat, on a historic trip to China.

In 1986, Johnson & Johnson announced it would no longer sell over-the-counter medications in capsule form,following the death of a woman who had taken a cyanide-laced Tylenol capsule.

In 1988, Lt. Col. William Higgins, a Marine Corps officer serving with a United Nations truce monitoring group, was kidnapped in southern Lebanon by Iranian-backed terrorists (he was later slain by his captors).

In 1996, world chess champion Garry Kasparov beat IBM supercomputer "Deep Blue," winning a six-game match in Philadelphia (however, Kasparov lost to Deep Blue in a rematch in 1997).

Ten years ago: President Barack Obama signed a mammoth, $787 billion economic stimulus package into law in Denver; he also approved adding some 17,000 U.S. troops for the war in Afghanistan.

Five years ago: The co-pilot of an Italian-bound Ethiopian Airlines Boeing 767 locked his captain out of the cockpit, commandeered the plane, then headed to Geneva,