But that’s the case with Penn­DOT’s Highland Park Interchange Project for which locally based, award-winning artist Brian Peters designed unique sound barrier walls. The wavy design is ...

NOVA spoke with him on the eve of the 50th anniversary of the breaking of the sound barrier. NOVA: How early on did the Americans get involved in pursuing high-speed flight? HALLION: The American ...

A civilian jet broke the sound barrier for the first time Tuesday while making a historic test flight over the Mojave Desert. The XB-1 aircraft, manufactured by Boom Supersonic, was piloted by ...