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The F-22 Raptor is a fifth-generation, single-seat, twin-engine, all-weather stealth tactical fighter aircraft developed by Lockheed Martin for the United States Air Force (USAF).

Author Mary Roach is back to help host Neil deGrasse Tyson and co-host Chuck Nice answer fan-submitted questions about the softer side of military science: people, from advances in combat medicine to the possibility of building super soldiers.