Democratic presidential candidate Sen. Barack Obama, D-Ill., left, with his wife Michelle Obama, Jill Biden, and vice presidential running mate Sen. Joe Biden, D-Del., wave on the steps in front of the Old State Capitol in Springfield, Ill. Saturday, Aug. 23, 2008. Obama introduced Biden as his running mate at the event. (AP Photo/Alex Brandon)

Today in History: August 23

Inside the story: Photo gallery

On Aug. 23, 1926, legendary silent film star Rudolph Valentino died in New York at age 31.