Morry Gash, Associated Press
Harrison Martin takes a jet pack for a test flight at the EAA Airventure Fly-in Tuesday in Oshkosh, Wis. The pack is powered by a 200-horsepower piston engine that runs on auto fuel.

Harrison Martin takes a jet pack for a test flight at the EAA Airventure Fly-in Tuesday in Oshkosh, Wis. The pack is powered by a 200-horsepower piston engine that runs on auto fuel.