A United Arab Emirates Air Force maintainer signals an F-16F Desert Falcon pilot after a mission during Exercise Red Flag 11-2 at Nellis AFB, Nevada, on 31 January 2011. The UAE Air Force is participating in Red Flag with its Block 60 F-16s for the second time. Red Flag is an advanced aerial combat training exercise held several times a year at Nellis AFB to strengthen international relations and training.