On this day: May 10

POSTED: 2:38 PM PDT May 9, 2013    UPDATED: 11:00 PM PDT May 9, 2013 
First Transcontinental Railroad, Golden Spike, 1869

The First Transcontinental Railroad is completed, "Rock Around the Clock" is released, The Incredible Hulk makes his debut, Wilt Chamberlain plays his last game, and Nelson Mandela is inaugurated, all on this day.