An Air Combat Command accident investigation board found that the bearing assembly of the No. 4 engine on an F-16 that crashed in Utah last March failed, leading to a compressor stall, vibrations, and loss of thrust. The pilot ejected safely after deciding he wasn’t close enough to glide to the nearest airfield. He restarted the engine once but had such poor engine thrust he couldn’t maintain level flight.
The rate of building B-21 bombers would speed up if the fiscal 2026 defense budget passes. But it remains unclear how much capacity would be added, and whether the Air Force would simply build the bombers faster, or buy more.