CRUNCH TIME Rocket companies in all-out battle for Air Force award

摘要

The U.S. Air Force has given United Launch Alliance, SpaceX, Northrop Grumman and Blue Origin until Aug. 1 to submit their bids to become one of just two launch providers that will be entrusted to carry high-value national security payloads to orbit in the decade ahead. After months of behind behind -the -scenes battles over the timing of the most consequential U.S. launch competition in the 20 years since the Air Force chose Atlas 5 and Delta 4 as its workhorse rockets, the battleground has shifted to theoretically neutral territory: the bid proposal.