Sometimes the medium gets in the way of the message. Last week the Colorado chapter of Greenpeace unveiled an antinuclear billboard blitz near the idle Rocky Flats nuclear-weapons plant outside Denver -- and ran afoul of another environmental group: Citizens Against Billboards on Highway 93.
Greenpeace's six-month campaign features a series of garish Day-Glo-red posters. The signs on the northbound side of the highway depict a worker in a protective suit and gas mask, and the southbound versions show an exploding nuclear bomb. Until Greenpeace slapped its posters on the billboards, they had been blank for two years as a result...