Saw an interesting PBS documentary last nite on the role of stereo aerial shots in WWII. I remember all the hours I spend looking through a
stereoscope at aerial photos back in the geological mapping lab. Google Earth doesn't even come close. But the point in relation to this thread is
how many millions of shots were taken from those recon flights, and every one of them was hand developed in a darkroom before the analysts
sorted them out by priority, print by print.