Event:
2012 Republican Party Presidential primary candidate Jon Huntsman drops out of the race, endorsing Mitt Romney
More Notable Events on January 15: 1997 Space Shuttle Atlantis docks with Mir Space Station
1975 Space Mountain opens at Disneyland
1973 Gene Shalit joins Today Show panel
1971 Aswan Dam official opens in Egypt
1943 World's largest office building, Pentagon, completed
