Northrop Grumman is working to mitigate cost burdens for the low-rate initial production phase of the B-21 Raider bomber, which is under a fixed-price contract negotiated in 2015 and doesn’t take recent inflation into account, Chief Financial Officer Dave Keffer said Wednesday. Northrop’s year-end earnings report noted a “possible” but not “probable” loss on one or more of the LRIP lots. Keffer said during the Cowen Aerospace/Defense and Industrial Conference that the company is doing what it can to mitigate...