Eye in the sky Published Oct. 2, 2002 OPERATION NORTHERN WATCH (AFPN) -- An E-3 Sentry Airborne Warning and Control System aircraft flies over the Turkish mountains during a sortie from Incirlik Air Base, Turkey, recently. The aircraft is deployed in support of Operation Northern Watch. ONW has been enforcing the no-fly zone over northern Iraq since 1997. (Photo by Tech. Sgt. Anna Hayman)