Though he’s famous for scaling buildings to steal from wealthy owners’ apartments, this was easier: “During several scouting visits, he discreetly sprayed the window’s mounts with acid so they could be easily dismantled later. Then, around 3 a.m. on May 20, 2010, he disassembled the window, removed the glass, cut the padlock and the chain of the metal grid behind it and entered the museum. The alarm systems remained silent.”