Three peace activists are facing harsher charges for infiltrating the U.S. government’s lone site for handling and processing weapons-grade uranium last week. Calling themselves the “Transform Now Plowshares,” the three reportedly cut through fences to paint slogans and throw blood on the wall of the Y12 nuclear weapons plant in Oak Ridge, Tennessee. The Y12 facility processes uranium for new hydrogen bombs and makes nuclear warheads. In an indictment unsealed on Thursday, the three activists — including an 82-year old nun — were charged with “depredation” of the plant, which carries a maximum of 10 years behind bars.