February 14, 1929, was the darkest day in Mob history, when Chicago gangsters “graduated from murder to massacre.” Ninety-three years later, and on The Mob Museum's 10th Anniversary, the Thompson submachine guns used in the St. Valentine’s Day Massacre made a historic reunion with the bricks from the Massacre wall and ballistic evidence from the crime scene, which are on permanent display at the Museum. Watch the full video here: https://youtu.be/4NH3byMHXsE | The Mob Museum