Defense contractors and telecommunications giants have been quietly meeting over the last several months to discuss how military systems and commercial wireless networks can co-exist in the electromagnetic spectrum, as the United States increasingly takes a sharing approach to making airwaves available for fifth-generation wireless networks. The "Spectrum Working Group" was convened under the National Defense Industrial Association in April at the behest of Under Secretary of Defense for Acquisition and Sustainment Ellen Lord, according to Corbin Evans, NDIA's principal...