1. The lesson discusses the Falcon Hypersonic Technology Vehicle-2 (Falcon HTV-2), the fastest aircraft ever built, which could fly from London to Sydney in under an hour. 2. The Falcon HTV-2 was developed as part of a US military project researching a type of aircraft that could reach any location in the world in less than an hour for both military and civilian purposes. 3. During its test flight, the Falcon HTV-2 would be launched into space on the back of a rocket before detaching and gliding back to Earth at hypersonic speeds of 13,000 mph, over 20 times the speed of sound.