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INFO: Full form for TBD is Transportation Benefit District in Governmental category
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The Texas Chain Saw Massacre is a 1974 American horror film produced and directed by Tobe Hooper from a story and screenplay by Hooper and Kim Henkel. It stars Marilyn Burns, Paul A. Partain, Edwin Neal, Jim Siedow and Gunnar Hansen, who respectively portray Sally Hardesty, Franklin Hardesty, the hitchhiker, the proprietor, and Leatherface. The film follows a group of friends who fall victim to a family of cannibals while on their way to visit an old homestead. The film was marketed as being based on true events to attract a wider audience and to act as a subtle commentary on the era's political climate; although the character of Leatherface and minor story details were inspired by the crimes of murderer Ed Gein, its plot is largely fictional.

Hooper produced the film for less than $140,000 ($700,000 adjusted for inflation) and used a cast of relatively unknown actors drawn mainly from central Texas, where the film was shot. The limited budget forced Hooper to film for long hours seven days a week, so that he could finish as quickly as possible and reduce equipment rental costs. Due to the film's violent content, Hooper struggled to find a distributor, but it was eventually acquired by Louis Perano of Bryanston Distributing Company. Hooper limited the quantity of onscreen gore in hopes of securing a PG rating, but the Motion Picture Association of America (MPAA) rated it R. The film faced similar difficulties internationally.

The Texas Chain Saw Massacre was banned in several countries, and numerous theaters stopped showing the film in response to complaints about its violence. While it initially drew a mixed reception from critics, it was highly profitable, grossing over $30 million at the domestic box office, equivalent with roughly over $150.8 million as of 2019, selling over 16.5 million tickets in 1974. It has since gained a reputation as one of the best and most influential horror films. It is credited with originating several elements common in the slasher genre, including the use of power tools as murder weapons, the characterization of the killer as a large, hulking, faceless figure, and the killing of victims. It led to a franchise that continued the story of Leatherface and his family through sequels, prequels, a remake, comic books and video games.

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Eric David Harris (April 9, 1981 – April 20, 1999) and Dylan Bennet Klebold (; September 11, 1981 – April 20, 1999) were an American mass murder duo who perpetrated the Columbine High School massacre. Harris and Klebold killed 13 people and wounded 24 others on April 20, 1999, at Columbine High School, where they were seniors, in Columbine, Colorado. After killing most of their victims in the school's library, they simultaneously committed suicide. At the time, it was the deadliest high school shooting in U.S. history, with the ensuing media frenzy and moral panic leading it to become one of the most infamous mass shootings ever perpetrated in the US.

Harris and Klebold met while they were in the 7th grade. Over time, they became increasingly close. By the time they were juniors, they were described as inseparable. There are differing reports: some say Harris and Klebold were very unpopular students and frequent targets of bullying, while others say they were not near the bottom of the school's social hierarchy and each had many friends. From their journals, Harris and Klebold had seemed to begin planning the attack a year prior. Throughout the next year, Harris and Klebold meticulously built explosives and gathered an arsenal of weapons. Harris and Klebold left behind several journal writings and home videos, foreshadowing the massacre and explaining their actions, with what they hoped to achieve.

After the massacre, it was widely believed Harris and Klebold were part of a clique in school called the "Trenchcoat Mafia", a group of misfits in the school who supposedly rebelled against the popular students. This turned out to be untrue, as neither Harris nor Klebold had any affiliation with the group. The pair's aforementioned writings and videos gave insight into their rationale for the shooting. The FBI concluded that Harris was a psychopath, who exhibited a lack of empathy, narcissistic traits and unconstrained aggression. Klebold, however, was concluded to be an angry depressive, who showed low self-esteem, anxiousness and a vengeful attitude toward individuals who he believed had mistreated him. However, neither Harris nor Klebold were formally diagnosed with any mental illnesses prior to the attack. In the following years, various media outlets attributed multiple motivating factors to the attack, including bullying, mental illness, racism, psychiatric medication and media violence. Despite these conclusions, the exact motive for the attack remains inconclusive.

Harris and Klebold have become pop culture icons, with the pair often portrayed, referenced and seen in film, television, video games, music and books. Many killers since the shooting have taken inspiration from the pair, either hailing them as heroes, martyrs and gods, or expressing sympathy for the pair. Harris and Klebold also have a fanbase, who have coined the term "Columbiners", who write fan fiction and draw fan art of them. Others have also dressed as the duo for cosplay or Halloween.

INFO: Full form for AMC is Aviation Structural Mechanic Chief Petty Officer in Governmental category
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A cop killer is a person who kills a police officer.

Cop killer or Cop Killer may also refer to:

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