The Navy has awarded Lockheed Martin a potential $846 million contract to begin building a new booster for a submarine-launched, maneuvering hypersonic payload, marking a significant development in the Pentagon's plans to ready a new class of ultra-fast conventional weapons to strike high priority, fleeting targets. On Feb. 26, the Navy's Strategic Systems Programs office awarded Lockheed Martin a fourth contract in the last nine months for work on a new booster, pushing spending to date to $925 million for...