Question: What city is this professional wrestling promotion that produced La Hora Cero based in?
Context: Consejo Mundial de Lucha Libre Co., Ltd. (CMLL; ] , "World Wrestling Council") is a "lucha libre" professional wrestling promotion based in Mexico City.  The promotion is also referred to by its previous name Empresa Mexicana de Lucha Libre (EMLL) ("Mexican Wrestling Enterprise").  Founded in 1933, it is the oldest professional wrestling promotion still in existence. Sin Salida (Spanish for "No Escape") is the collective name of a series of intermittently major professional wrestling, or "Lucha Libre", shows held by the Mexican professional wrestling promotion professional wrestling promotion Consejo Mundial de Lucha Libre (CMLL).  To date CMLL has held three shows under the "Sin Salida" date, one in 2009 in December and events in 2010 and 2013 that were held in June of those years.  The main event of each of the shows has featured one or more wrestlers putting their hair on the line in a "Lucha de Apuesta", or bet match.  In 2009 and 2010 the theme of the main event was "Mexico vs. Japan" as CMLL regulars faced off against wrestlers from CMLL's partner promotion in Japan New Japan Pro Wrestling (NJPW) and marked the end of extended tours for Yujiro Takahashi, Tetsuya Naito and Taichi Ishikari.  In 2013 10 "Mini-Estrellas" put their hair or their wrestling mask on the line in a Steel cage elimination match where the last man, Pequeño Violencia was shaved bald.  CMLL has announced that they will hold a "Sin Salida" (2015) event on July 19, 2015. The Arena Naucalpan 35th Anniversary Show was an annual professional wrestling major event produced by Mexican professional wrestling promotion International Wrestling Revolution Group (IWRG), which took place on December 20, 2012 in Arena Naucalpan, Naucalpan, State of Mexico, Mexico.  The show celebrated the 35th Anniversary of the construction of Arena Naucalpann, IWRG's main venue.  The main event was a five team steel cage match contested under elimination rules.  The teams were "La Familia de Tijuana" (Damian 666 and X-Fly), "Los Hermanos Dinamita, Jr." (Hijo de Máscara Año 2000 and Máscara Año 2000, Jr.) and the father/son duos of Dr. Wagner, Jr. and El Hijo de Dr. Wagner, Jr., El Canek and El Canek, Jr. and "Los Piratas" (Hijo de Pirata Morgan and Pirata Morgan).  Damian 666 was originally slated to team with his son Bestia 666, but was replaced by X-Fly.  The match was contested under escape rules, which meant that the last team member in the ring would be the loser.  Dr. Wagner, Jr. as well as "Los Infierno Rockers" and "Los Psycho Circus" who worked on the under card all appeared through IWRG's working relationship with fellow Mexican wrestling promotion AAA.  The undercard also saw the continuation of the storyline feud between Fuerza Guerrera and Black Terry as well as a "Torneo cibernetico" elimination match between a team representing IWRG's wrestling school and a team representing Fuerza Guerrera's school "Gimnasio Konkreto". Guerra de Empresas (2012) (Spanish for "War of the Promotions") was an annual professional wrestling major event produced by Mexican professional wrestling promotion International Wrestling Revolution Group (IWRG), which took place on July 8, 2012 in Arena Naucalpan, Naucalpan, State of Mexico, Mexico.  The event focused on an eight-tag team tournament between representatives of IWRG, AAA, Desastre Total Ultraviolento (DTU), "La Familia de Tijuana" (FdT) and "Los Perros del Mal" (PdM) to underline the "War of the Promotions" concept.  While wrestlers all represented their "home" promotion they had competed on IWRG events prior to this event, either through IWRG's working relationship with AAA or due to be in independent contractors and not signed exclusively with one specific wrestling promotion. The Zero Hour (Spanish: "La hora cero" ) is a 2010 Venezuelan action film directed by Diego Velasco. Antonio Hipolito Peña Herrada (June 13, 1956 – October 5, 2006) was the founder of the Mexican professional wrestling promotion Asistencia Asesoría y Administración (AAA) in 1992, which today is the largest wrestling promotion in Mexico.  Peña's promotion reached its height of popularity in the early 1990s before the downturn of the Mexican economy.  Peña's AAA is the promotion largely responsible for bringing the "Lucha" style to the United States, with such wrestlers as Rey Mysterio Jr., Psicosis, La Parka, Konnan and others.  Peña was the former head booker of Empresa Mexicana de Lucha Libre (EMLL) before forming AAA.  Peña began his professional wrestling career as a wrestler or "Luchador", as they're called in Spanish, working under various masks as El Genio, Espectro Jr., Kahoz, Espectro de Ultratumba and Dalia Negra before retiring in 1986 to work with the promotional side of wrestling. All Star Wrestling is a British Professional wrestling promotion also known as All Star Promotions, Superslam Wrestling and Big Time Wrestling and originally known as Wrestling Enterprises (of Birkenhead), run by Brian Dixon and based in Liverpool, England.  Dixon's promotion tours theatres, leisure centres, town halls and similar venues, many of them old venues for televised wrestling in the UK in the 1950-1980s, as well as holiday camps.  It is the oldest active wrestling promotion in the UK, and furthermore the longest-running UK wrestling promotion ever - a record it has held since September 2013, when it eclipsed the 42 years and 11 months lifespan of Joint Promotions/Ring Wrestling Stars (March 1952– February 1995). In professional wrestling, championships are competed for in pre-determined matches and as a result of storylines by a professional wrestling promotion roster of wrestlers.  As of 2016 the Mexican "Lucha libre" or professional wrestling promotion known as Consejo Mundial de Lucha Libre (Spanish for "World Wrestling Council"; CMLL) promotes 23 different championships; 12 championships designated as World Championships in various divisions, 5 championships on a national level and 6 championships on a regional level.  The championships are divided into weight limits as well as gender specific and size-specific divisions.  The professional wrestling championships are not won through legitimate athletic competition; they are instead won via scripted endings to a match or on occasion awarded to a wrestler because of a storyline. Ernie Pike is a comics series written by Héctor Germán Oesterheld and originally drawn by Hugo Pratt, starring a World War II and Korean War reporter.  It was first published in the magazine ""Hora Cero"" in Buenos Aires, Argentina, in 1957.  The reporter, loosely based on the real reporter Ernie Pyle, acts as a narrator of stories, without being directly involved in them.  Such stories do not narrate real battles or exploits of noteworthy military people, being instead tragic stories of unknown soldiers, made up by the author.  Oesterheld worked again with the character during the time of the Vietnam War, and Ricardo Barreiro used it for a brief story about the Falklands War. La Hora Cero (Spanish for "Zero Hour") was a professional wrestling major show event produced by Consejo Mundial de Lucha Libre (CMLL), which took place on January 11, 2009 in Arena Mexico, Mexico City, Mexico.  Six matches took place at La Hora Cero, with the main event being a multi-man Steel Cage where the last man in the cage would lose his mask.  13 Mini-Estrella (the Spanish term for dwarf wrestlers) took part in the match; the match ended with Shockercito and Pierrothito being the last two men in the cage; Pierrothito subsequently pinned Shockercito to win the match.  Following the match Shockercito was unmasked per Lucha Libre traditions.  The show also featured four under card matches.
Answer: Mexico City