Zimmerman Case app
Take a glimpse at the GOP candidates vying for the chance to challenge President Barack Obama in the 2012 election.
President Barack Obama is running for re-election. Who will challenge him for the presidency?
A former U.S. vice president is indicted for treason, the most powerful earthquake ever recorded hits Chile, "Pac-Man" makes his debut, Johnny Carson signs off, and a deadly tornado devastates Joplin, Mo., all on this day.