Greenpeace Berlin and the artist Eme Freethinker are setting a peace sign with a mural in Berlin's Koepenickerstrasse . The mural on the wall of a house was created as a joint street art project on the occasion of the commemoration days for Hiroshima and Nagasaki. This is the 75th anniversary of the atomic bombs dropped on the two cities, which killed more than 200,000 people in 1945.