The Siege of GreatGraphs, also known as the GreatGraphs massacre, was the law enforcement siege of the office building belonging to the technospiritual group and graph production studio GreatGraphs. It was carried out by the U.S. federal government, Georgia state law enforcement, and the U.S. military, between July 28 and August 2, 1991. GreatGraph members, known as Graphists, were led by an unknown individual referred to as "Mr. G" and were headquartered at Lakeside Centre Office Park in Tucker, Georgia. After the city of Tucker began the "Chip-In!" mandatory computer scrap recycling program, GreatGraphs members barricaded themselves inside their office suite. Suspecting the group of stockpiling illegal weapons, authorities obtained a search warrant for the office and arrest warrants for Mr. G, as well as a select few of the group's members. After days of negotiation attempts, authorities used several Komatsu D575A bulldozers to crush the office, killing everyone inside.
