America’s most notorious federal prison, a terrorist detention facility at Guantánamo Bay, Cuba, took center stage for a short period in the early days of President Donald Trump’s first 100 days, when the administration began sending some of the “worst of the worst” criminal illegal aliens there. Also known as “Gitmo,” Guantánamo is a 45-square-mile high-security naval base in Cuba and houses some of America’s most deadly enemies,...