US Air force puts on a great air show at its annual red flag exerice. Red Flag is an advanced aerial combat training exercise hosted at Nellis Air Force Base, .br AWESOME AIRSHOW at the annual us air force Red Flag exercise US Air force puts on a great air show at its annual red flag exerice. Red Flag is an advanced .br US Air force puts on a great air show at its annual red flag exerice. Red Flag is an advanced aerial combat training exercise hosted at Nellis Air Force Base, .