USAF’s X-51A unmanned hypersonic air vehicle makes first flight, flying further on its own power than any other scramjet in history. A B-52 mothership carried aloft the Boeing-built X-51, which flew at Mach 5 for about 200 seconds before program officials terminated the flight. Pratt & Whitney- Rocketdyne developed the vehicle’s revolutionary SJY61 engine. USAF officials later revealed that testers had to prematurely terminate the flight because of a breached seal in the interface between the air vehicle and its engine.
Watchdog Says Military Can Make Cyber Ops More Efficient
Sept. 17, 2025
The Government Accountability Office called for paring down the military's sprawling cyber enterprise in a recent report, amid renewed discussion about standing up a separate cyber force.
