1. An airborne stereoscopic imaging system comprising: a first aircraft having opposed first and second wings; a first imaging sensor attached to one of said wings in a generally forward-facing field of view; a second imaging sensor attached to the other of said wings in a generally forward-facing field of view; said sensors being spaced from each other along a predetermined baseline distance and each sensor being movable to scan and focus at an object positioned at a distance, generally in advance of an intended flight path of said aircraft; a stereo viewer in said aircraft for receiving imaging signals from said sensors; means connected between said sensors and said stereo viewer for transmitting imaging signals from said sensors to said stereo viewer, such that the depth perception of a human viewer in said aircraft, viewing a display on said stereo viewer representative of the imaging signals received by said stereo viewer, is enhanced; and further including a second aircraft, said second aircraft containing a third imaging sensor and means for radio-link transmitting a signal representative of an image on said third sensor to said first aircraft wherein the baseline distance between one of said first and second sensors and said third sensor represents said predetermined baseline distance.