Baz was later convicted of murder. He was apparently acting out of revenge for the Hebron massacre of Palestinian Muslims a few days prior to the incident. After initially classifying the killing as one committed out of road rage, the Justice Department reclassified the case in 2000 as a terrorist attack. The entrance ramp to the bridge on the Manhattan side was subsequently dedicated as the Ari Halberstam Memorial Ramp. Several potential attacks or disasters have also been averted. In 1979, police disarmed a stick of dynamite placed under the Brooklyn approach, and an artist in Manhattan was later arrested for the act. In 2003, truck driver Iyman Faris was sentenced to about 20 years in prison for providing material support to Al-Qaeda, after an earlier plot to destroy the bridge by cutting through its support wires with blowtorches was thwarted. Arrests 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. On October 1, 2011, more than 700 protesters with the Occupy Wall Street movement were arrested while attempting to march across the bridge on the roadway. Protesters disputed the police account of the events and claimed that the arrests were the result of being trapped on the bridge by the NYPD. The majority of the arrests were subsequently dismissed. On July 22, 2014, the two American flags on the flagpoles atop each tower were found to have been replaced