U.S. RC-135U plane was spotted near Poland when Russian jet ' flew across ' territory . Russian reconnaissance Flanker conducted ' aggressive maneuvers ' Russia insists they were trying to identify the aircraft by circling it .
U.S. RC-135U plane was flying near Poland when Russian jet 'cut across ' Pentagon says Russian SU-27 Flanker made 'aggressive maneuvers ' Russia insists they were trying to identify the plane by circling it .