NASA test pilot Joe Walker is killed when his Lockheed F-104 makes contact with the No. 2 North American XB-70 Valkyrie in flight, gets caught in vortices coming off the Valkyrie’s wingtips, and rolls through the XB-70’s twin tails. XB-70 copilot Carl Cross is also killed and the Valkyrie, one of only two built, is destroyed.
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.
