USAF is “comfortable” with the decision to terminate the F136 alternative engine for the F-35 Joint Strike Fighter program, said Lt. Gen. Stephen Wood. Modern engines are so reliable that the Air Force doesn’t feel an alternate is a compelling requirement in order to guard against a fleet-grounding problem with the F135.
The Space Force is playing midwife to a new ecosystem of commercial satellite constellations providing alternatives to the service’s own Global Positioning Service from much closer to the Earth, making their signals more accurate and harder to jam.