https://upload.wikimedia.org/wikipedia/commons/thumb/7/7c/First_proton_antiproton_collider_interactions_as_seen_by_the_streamer_chamber_of_UA5_in_April_1981%2C_CERN.jpg/120px-First_proton_antiproton_collider_interactions_as_seen_by_the_streamer_chamber_of_UA5_in_April_1981%2C_CERN.jpg