DARPA, the governmental department that researches crazy things that may eventually make it into the military, is currently working on an “ultrasonic curtain”. In layman’s terms, it’s a sonic cloaking ...

Here’s What You Need to Remember: Round-the-clock operations took a toll on the 1980s-vintage warplanes. The Air Force twice in 2018 and 2019 grounded the B-1 fleet following mechanical failures. Just ...