The Mob Museum in downtown Las Vegas celebrates its 12th anniversary with free admission for Nevada residents and buy-one, get-one admission for everyone else. If that's not enough of a reason to drop by, they will have on display the two Thompson submachine guns used in the St. Valentine’s Day Massacre in Chicago in 1929.

Members of the Berrien County, Michigan, Sheriff’s Department, where the firearms are usually kept, will be on hand to share insights and discuss the historical significance of the firearms. And, other St. Valentine’s Day Massacre-related items from the Museum’s extensive collection will be on display.

Former mobster Frank Calabrese Jr. will be sharing the story of his life with the Chicago Outfit and the Las Vegas Cadillac Club will have a display of historic vehicles.