Members of the Air Force Academy's Class of 1975 congratulate cadets in the Class of 2015 on their formal acceptance into the Cadet Wing during the Acceptance Day Parade Aug. 3, 2011. The Class of 1975 is the legacy class for the new freshmen. (U.S. Air Force photo/Megan Davis) Members of the Air Force Academy's Class of 2015 take the Honor Oath during the Academy's Acceptance Day Parade Aug. 3, 2011. Cadets may not lie, steal or cheat, nor tolerate among their ranks anyone who does. In addition, they swear to do their duty and to live honorably. (U.S. Air Force photo/Megan Davis) Cadets in the Class of 2015 exchange their baseball caps for Airman Battle Uniform caps to signify their transition into the Cadet Wing during the Acceptance Day Parade Aug. 3, 2011. The baseball caps are gold, signifying the freshmen's class color. (U.S. Air Force photo/Megan Davis) Cadet Wing accepts Class of 2015 8/4/2011 - U.S. AIR FORCE ACADEMY, Colo. -- The Air Force Academy's Cadet Wing formally absorbed the Class of 2015 into its fold during the annual Acceptance Day Parade here Aug. 3. During the ceremony, basic cadets received copies of "Contrails" from their legacy class, the Class of 1975. They swore the Academy's Honor Oath before exchanging their gold baseball caps for Airman Battle Uniform caps and joining cadets from the classes of 2012, 2013 and 2014. During Acceptance, the new freshmen march toward the Cadet Wing in an inverse wedge formation to signify their entrance into the Cadet Wing. At the Graduation Parade, the outgoing seniors march out of Stillman Field in a wedge formation, signifying their departure. View the slideshow.