On this day: July 15

POSTED: 02:20 PM MDT Jul 10, 2013    UPDATED: 12:00 AM MDT Jul 15, 2014 
PSY Gangnam Style video

Jerusalem falls to the Crusaders, the Rosetta Stone is uncovered, Napoleon surrenders, the Nintendo Entertainment System debuts in Japan, and Psy unleashes "Gangnam Style" on the Internet, all on this day.