While fighter jets can fly across the U.S. at record speed, the planet is significantly larger. On top of that, defining what "across the world" means is also important. The farther you are north ...

The aircraft is designed fly autonomously, reaching Mach 4 (3,069 mph), with a range of 1,864 miles and flight altitude of 12.4 miles. The Yunxing passenger jet will have a top speed of Mach 4 ...

It has to be tethered to a jet ski to work as it uses the personal water craft's engine to fly. The machine can go up to 40-feet into the air and has a 66-foot long tether line. Skilled riders are ...