Chaplain Perry Polk, of the Travis Air Force Base Composite Squadron 22 of the Civil Air Patrol in Fairfield, works on cutting out foam model airplanes as cadets learn to fly radio-controlled aircraft at the East Bay Radio Controllers field in Livermore, Calif., Monday, July 22, 2013. Polk said the models will be used in a lesson about flight. The cadets are participating in a weeklong program to hone their flying skills. (Cindi Christie/Bay Area News Group)