Diane Capone Pette is the granddaughter of Al Capone, one of the most infamous mobsters in American ... One of their most treasured hand-me-downs was Capone’s favorite weapon, a Colt 1911 .45-caliber pistol that was popular during World War I.

Al Capone’s Colt 1911 .45-caliber pistol was so special that he named it “sweetheart”, because it saved his life so many times.

According to The Associated Press, the Mob Museum in downtown Las Vegas is opening its new exhibit "The First Public Enemy," dedicated entirely to Capone, on Jan. 15. You'll be able to get a close look at Capone's favorite personal weapon as well as a rare home movie filmed by Capone himself in 1929.