Joint STARS aircraft undergoing work at a contractor facility may have been sabotaged. A tersely worded statement issued by Robins Air Force Base on Tuesday indicated that workers at Northrup Grumman’s Lake Charles, La., facility have discovered severed wires on an E-8C jet. “To ensure the integrity of the maintenance process, we are working with Northrop Grumman to get to the root cause,” the statement added. “The matter is currently under investigation and more details will be released as they become available.”