At left, sign used by the Heinrich Boell Foundation at the Keep Fear Alive rally in DC on October 30. At right a sign used by Greenpeace Italy.
Both these images can be reproduced AS IS without changes and used freely. Use of the Nuclear Emergency art (above right) must be accompanied by the following credit: Greenpeace: The Scream - Malgorzata Bedowska - Poland - Good50x70.
Here's a video of I Have A Scream in action - the German Greens at the Stewart/Colbert DC rally.