U.S. Air Force Staff Sgt. Alex Niccum, F-22 Raptor Demonstration dedicated crew chief, signals Maj. Paul "Loco" Lopez, F-22 Raptor Demo commander/pilot during the Cold Lake Air Show at Canadian Forces Base Cold Lake, Canada, July 21, 2018. The Raptor demo team relies on hand signals to convey messages while the aircraft is running on the flight line.