Charles Justiz is a pilot, corporate aviation safety consultant and the author of Specific Impulse.  He is a graduate of the US Air Force Academy and a former officer of the US Air Force, and retired from NASA where he was rated as both an instructor pilot and an examiner pilot in the Astronaut T-38, the Shuttle Training Aircraft (with more than 25 years of experience and 15,000+ Shuttle approaches), the C-9 and in the 747 Shuttle Carrier. A first generation Cuban-American, Justiz holds a PhD in Engineering. He lives in Seabrook, Texas with his wife, author Dayna Steele, and their three sons.  He is currently working on his next thriller, Mass Fraction, and advising on the film version of his first novel Specific Impulse.