The Federal Trade Commission said this week it is imposing conditions on Northrop Grumman to ensure continued competition in the missile systems market following Northrop's acquisition of Orbital ATK . In an announcement of the proposed consent agreement, the FTC notes that Northrop is one of four companies capable of supplying the U.S. government with missile systems. Orbital ATK, it adds, “is the premier supplier of [solid-rocket motors], which propel missiles to their intended targets and are an essential input...