SpaceX plans to start off the week with two rocket launches on April 21 - and sonic booms expected with both launches.

The Chinese airframer has a way to go in designing a supersonic airliner and has yet to fly a low-boom demonstrator similar ...

Imagine standing in the heart of a sun-scorched desert. The wind hushes, the world holds its breath, and suddenly, a deep, thunderous boom rolls across the sand—so startling and powerful, it seems as ...