MOSCOW, December 25. /TASS/. The first batch-produced fighter Sukhoi Su-57 will be used for testing hypersonic air-launched weapons at the flight test center in Akhtubinsk, a source in the defense ...

The aircraft, detailed in blueprints in a recent academic paper, is meant to reach Mach 1.6 and have a barely audible sonic boom when the project comes to fruition, according to the outlet.

Original story: The second SpaceX launch — and sonic boom — of the day will occur tonight after sunset. A Falcon 9 rocket is scheduled to launch SpaceX's third rideshare mission, known as ...