An 85-year-old nun and two fellow Catholic peace activists who splashed blood on the walls of a bunker holding weapons-grade uranium - exposing vulnerabilities in the nation's nuclear security - were wrongly convicted of sabotage, an appeals court ruled Friday. At issue was whether Sister Megan Rice, 66-year-old Michael Walli and 59-year-old Greg Boertje-Obed injured national security when they cut through several fences to break into the Y-12 National Security Complex in Oak Ridge in July 2012. A panel of the 6th U.S. Circuit Court of Appeals ruled in a 2-1 decision that they did not. Once there, the trio had hung banners, prayed and hammered on the outside wall of the bunker to symbolize a Bible passage that refers to the end of war: They will beat their swords into ploughshares." "If a defendant blew up a building used to manufacture components for nuclear weapons ... the government surely could demonstrate an adverse effect on the nation's ability to attack or defend," the opinion says. "But vague platitudes about a facility's 'crucial role in the national defense' are not enough to convict a defendant of sabotage." Rice wrote in a letter to The Associated Press in March that "the important message of the appeal is the illegality of nuclear weapons, which are sabotaging the planet."