The jet engine changed civilization forever, making global travel cheaper and faster. More than 100,000 commercial jet flights take off and land every day, while super high-tech military jets can blast through the sky at over six times the speed of sound. From the first prototype gas-turbine engine to tomorrow’s hypersonic jets, this is the ultimate history of the jet innovation, told by the inventors and pioneers who risked their lives to pilot them to new heights and speeds.