Flanker Dogfighting with F-16 Over Groom Lake

Although not very sharp due to being taken from a long distance away, this image taken on November 8 clearly shows an Su-27 Flanker which was engaged in dissimilar air combat manoeuvres with an F-16 over Tikaboo Valley, 20 miles (32km) east of Groom Lake, Nevada, between 1500 and 1525hrs, at 20,000ft. Although there have been suggestions it could have been a civilian contracted example operated by Tac-Air, their aircraft is a two-seat Su-27UB and close inspection of this image