With a coal train visible in the background, Greenpeace activists hang off of one of Pittsburgh's iconic bridges with massive banner displaying a message to the G20 leaders gathering for a summit in Pittsburgh the following day. The banner, nearly 80-feet by 30-feet (24 x 9 meters) in size, takes the form of a stylized 'road sign' that warn of the political maneuvering and delay that have put a international climate treaty in jeopardy as the world enters the final stretch on the road to Copenhagen.