Six days a week for the past four decades, 67-year-old Daniel Jackson has shown up to work at New Orleans cemeteries. He's seen lightning strike stone angels and hurricanes topple tombstones. He's buried toddlers, Katrina victims, convicted killers and his own siblings. And on a recent spring day, he lounges in a plastic chair wedged in the shade of Carrollton Cemetery and describes his longtime profession as "quiet and peaceful." Jackson's former boss, Henry Nelson, who hung up his own shovel years ago, sits with his legs crossed next to him and stares out at a labyrinth of weathered tombstones....