Radio Free Asia says it is shutting down its news operations starting on Friday. The outlet says the action is due to the government shutdown and the Trump administration's efforts ...

Sleek aircraft is designed to break the sound barrier with little noise and pave the way for faster commercial air travel ...

Two decades after Concorde was grounded, NASA's X-59 makes history with a quieter approach to supersonic flight.

NASA's X-59 supersonic-but-quiet jet soared over the Southern California desert on Tuesday in the first test flight of an ...