3.2.5.4.(ACC) Left Sleeve. A vivid emblem, approximately 3 X 3 inches in size, of the appropriateparent wing, separate operating group, or numbered air force will be worn on the Velcro. Members may wear the Weapons School Patch, USAF Test Pilot School (graduate or instructor) upon completion of the appropriate school. Installation commanders prescribe wear of the U.S. flag on the FDU. If prescribed, implementation will be installation wide.
Doesn't sound like you get to pick.