On this day: December 20

POSTED: 10:21 PM PST Dec 19, 2012    UPDATED: 11:00 PM PST Dec 19, 2012 
U.S. invasion of Panama, 1989

The Louisiana Purchase is completed, South Carolina secedes from the U.S., Edison demonstrates his incandescent light, Elvis gets drafted, and the U.S. invades Panama, all on this day.