The Army's research facility includes a permafrost tunnel — about a third of a mile long — that has Ice Age-era animal bones jutting out from the walls.
EPAWSS comes standard in the new F-15EX Eagle II, and the Air Force wants to retrofit some existing F-15E jets with the advanced electronic warfare system.
A handful of operational U.S. Army brigades now have a tool to “see” how they and enemy forces look in the otherwise invisible electromagnetic spectrum.