In November, Dick’s Sporting Goods sold a gun to Nikolas Cruz, the person who committed the Parkland Shooting. The gun Dick’s sold to him wasn’t the one used in the attack, but the thought that it could have been was enough for the sports retailer to announce it will stop selling assault-style weapons and will require buyers to be at least 21 years old. Dick’s also published a letter directed towards Congress to change a number of laws in order to prevent gun violence.