President Donald Trump announced he wants to reopen Alcatraz, the prison near San Francisco that was featured in prominent movies and held famous criminals. The move was unexpected and shocked many. The prison is a museum and hasn’t been in operation for decades. But Trump wants the prison to “house America’s most ruthless and violent offenders.”

Trump says Alcatraz, now part of the National Park Service, suddenly is needed to house America’s “most ruthless and violent” criminals. It’s where the government sent notorious gangsters Al Capone and George “Machine Gun” Kelly as well as lesser-known men who were considered too dangerous to lock up elsewhere.