Over Easter weekend 2015, a motley crew of six English thieves, several in their sixties and seventies, couldn't resist coming out of retirement for one last career-topping heist. Their target: the Hatton Garden Safe Deposit, in the heart of London's medieval diamond district. "The Firm" included Brian Reader, ringleader and legend in his own mind; Terry Perkins, a tough-as-nails career criminal but also a frail diabetic; Danny Jones, a fitness freak,...