On this day: July 13

POSTED: 10:23 AM MDT Jul 09, 2012    UPDATED: 12:00 AM MDT Jul 13, 2012 
Hollywoodland sign, Hollywood

The Mississippi River finds its roots, a Hollywood icon debuts, Old Blue Eyes records for the first time, the MLB All-Star Game goes north and Ronald Reagan gives up the presidency, briefly, all on this day.