At 9:00 a.m. on May 19, 1977, artist Jack Bashkow climbed one of the towers for "Bridging", a "media sculpture" by the performance group Art Corporation of America Inc. Seven artists climbed the largest bridges connected to Manhattan "to replace violence and fear in mass media for one day". When each of the artists had reached the tops of the bridges, they ignited bright-yellow flares at the same moment, resulting in rush hour traffic disruption, media attention, and the arrest of the climbers, though the charges were later dropped. Called "the first social-sculpture to use mass-media as art” by conceptual artist Joseph Beuys, the event was on the cover of the "New York Post", received international attention, and received ABC Eyewitness News' "1977 Best News of the Year" award. John Halpern documented the incident in the film "Bridging, 1977". Halpern attempted another "bridging" "social sculpture" in 1979, when he planted a radio receiver, gunpowder and fireworks in a bucket atop one of the towers. The piece was later discovered by police, leading to his arrest for possessing a bomb.