A Dart Over The Desert -- A photographer in the tail gunner's position in a B-25 bomber captured this head-on flight view of convair's XF-92A research interceptor high over California's Mojave desert. The picture is the first of its kind released. The plane, being piloted by Maj. Charles E. Yeager, first man to fly faster than sound, is the fore-runner of the XF-102 supersonic delta wing interceptor recently ordered into production at Convair's San Diego plant. Parallel lines on wing at left ar