Explorer I, the first US satellite, is launched by the Army at Cape Canaveral, Fla. The satellite, launched on a Jupiter-C rocket, will later play a key role in the discovery of the Van Allen radiation belt.
Whether the F-35 fighter will get new engines from the Air Force’s cutting-edge Adaptive Engine Transition Program is a question that needs to be resolved at the Defense Department level, Air Force Secretary Frank Kendall told lawmakers May 17—and he anticipates an answer in the 2024 budget.