It has not been determined whether improvements to the Army's troubled augmented-reality goggles would require the service to fully replace the equipment it has already bought, or whether existing goggles could be modified, the Army acquisition executive said March 9. “I don’t know yet,” Doug Bush told reporters at the McAleese defense conference in Washington. “It would certainly be better if we could avoid having to buy all new.” New and improved software could usually be installed without hardware modifications,...