While a USAF Northrop Grumman RQ-4B (reg. 11-2046, callsign FORTE11) is returning to Sigonella after a surveillance mission of about 21 hours south of Crimea, another USAF Northrop Grumman RQ-4B (reg. 10-2045, callsign FORTE10) is in flight over the Black Sea to carry out a new surveillance mission.
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