serve as a flight instructor at Bryan AFB in Bryan, Texas, where he was joined by his wife, Betty, and son, Scott. The Grissoms' second child, Mark, was born there in 1953. Grissom soon learned that flight instructors faced their own set of on-the-job risks. During a training exercise with a cadet, the trainee pilot caused a flap to break off from their two-seat trainer, sending it into a roll. Grissom quickly climbed from the rear seat of the small aircraft to take over the controls and safely land it. In August 1955, Grissom was reassigned to the U.S. Air Force Institute of Technology (AFIT) at Wright-Patterson Air Force Base near Dayton, Ohio. After completing the year-long course he earned a bachelor's degree in aeromechanics in 1956. In October 1956, he entered the U.S. Air Force Test Pilot School at Edwards Air Force Base in California, and returned to Wright-Patterson AFB in Ohio in May 1957, after attaining the rank of captain. Grissom served as a test pilot assigned to the fighter branch. NASA career In 1959, Grissom received an official teletype message instructing him to report to an address in Washington, D.C., wearing civilian clothes. The message was classified "Top Secret" and Grissom was ordered not to discuss its contents with anyone. Of the 508 military candidates who were considered, he was one of 110 test pilots whose credentials had earned them an invitation to learn more about the U.S. space program in general and its Project Mercury. Grissom was intrigued by the program, but knew that competition for the final spots would be fierce. Grissom passed the initial screening in Washington, D.C., and was among the thirty-nine candidates sent to the Lovelace Clinic in Albuquerque, New Mexico, and the Aeromedical Laboratory of the Wright Air Development Center in Dayton, Ohio, to undergo extensive physical and psychological testing. He was nearly disqualified when doctors discovered that he suffered from hay fever, but was permitted to continue after he argued that his allergies would not be a problem due to the absence of ragweed pollen in space. On April 13, 1959, Grissom received official notification that he had been selected as one of the seven Project Mercury astronauts. Grissom and the six other men, after taking a leave of absence from their respective branches of the military service, reported to the Special Task Group at Langley Air Force Base in