How did photographers manipulate images before computers? In many clever ways, sometimes by just cutting and pasting (literally). Sometimes they employed other methods such as exposure tricks or painting. The Metropolitan Museum of Art's collection of manipulated photos is being shown at the National Gallery of Art in DC this Spring. This show is being sponsored by (surprise!) Adobe. The photos are all mesmerizing and in some cases eerie and creepy. The WP has reviewed the show and the NGA has provided a catalog of the works on display.