Question: Who directed the film which won the BAFTA Award for Best Editing in 2006?
Context: Richard Pearson (born 1961) is an American film editor who is mainly associated with action films.  Pearson, with Clare Douglas and Christopher Rouse, received the BAFTA Award for Best Editing for the film "United 93" (2006). Stewart Bridgewater Linder (November 8, 1931 – January 12, 2006) was an American film editor with 25 credits.  He shared the Academy Award for Film Editing for the 1966 film "Grand Prix" (directed by John Frankenheimer), which was the very first film on which Linder was credited as an editor.  Linder is particularly noted for his long collaboration (1982-2006) with the director Barry Levinson.  Perhaps the best remembered film from their collaboration, which extended over 20 films, was "Rain Man" (1988), which won the Academy Award for Best Picture.  Linder won an ACE Eddie award for editing this film, and was nominated for both the Academy Award and the BAFTA Award for Best Editing. The Academy Award for Best Film Editing is one of the annual awards of the Academy of Motion Picture Arts and Sciences (AMPAS).  Nominations for this award are closely correlated with the Academy Award for Best Picture.  For 33 consecutive years, 1981 to 2013, every Best Picture winner had also been nominated for the Film Editing Oscar, and about two thirds of the Best Picture winners have also won for Film Editing.  Only the principal, "above the line" editor(s) as listed in the film's credits are named on the award; additional editors, supervising editors, etc. are not currently eligible.  The nominations for this Academy Award are determined by a ballot of the voting members of the Editing Branch of the Academy; there were 220 members of the Editing Branch in 2012.  The members may vote for up to five of the eligible films in the order of their preference; the five films with the largest vote totals are selected as nominees.  The Academy Award itself is selected from the nominated films by a subsequent ballot of all active and life members of the Academy.  This process is essentially the reverse of that of the British Academy of Film and Television Arts (BAFTA); nominations for the BAFTA Award for Best Editing are done by a general ballot of Academy voters, and the winner is selected by members of the editing chapter. Julian Clarke (born September 3, 1977) is a Canadian film editor.  Clarke was born in Vancouver.  He graduated from Kitsilano Secondary School before enrolling at the University of British Columbia as a film major.  After graduating from UBC in 2000, Clarke immediately began to find work as a professional film editor.  Clarke was nominated for a 2009 Academy Award for Best Film Editing, a BAFTA Award for Best Editing, an ACE Eddie Award for Best Edited Feature Film (Dramatic), a Satellite Award for Best Editing, and an Online Film Critics Society Award for Best Editing for his work on the science-fiction film, "District 9". Angus Alexander Wall (born March 15, 1967) is a film editor and film title designer.  He and fellow film editor Kirk Baxter won the Academy Award for Best Film Editing for the David Fincher film "The Social Network" (2010) and again the next year for "The Girl with the Dragon Tattoo" (2011).  Additionally, he and Baxter were nominated the Academy Award for Best Film Editing, the BAFTA Award for Best Editing, and the American Cinema Editors Eddie Award for the 2008 film "The Curious Case of Benjamin Button", also directed by David Fincher.  Wall's title design work on the HBO television series "Carnivàle" and "Game of Thrones" both received Emmy Awards in 2004 and 2011, respectively, and his work on the series "Rome's" titles was nominated for the BAFTA Award in 2005. The BAFTA Award for Best Editing is one of several annual awards presented by the British Academy of Film and Television Arts (BAFTA).  The film-voting members of the Academy select the five nominated films in each category; only the principal editor(s) for each film are named, which excludes additional editors, supervising editors, etc.  The actual winner of the Best Editing award is selected by "Chapter Voting"; only Academy members who are identified as members of the Editing Chapter vote on the winner.  The BAFTA procedure is essentially the reverse of that of the American Academy of Motion Picture Arts and Sciences, in which members of the Editing Branch of the Academy select the nominees, but all members of the Academy vote to select the winner; see the article Academy Award for Film Editing. Daniel Rezende (born 1975) is a Brazilian film editor and director.  He won the BAFTA Award for Best Editing for his work on the 2002 film "City of God" and was also nominated for an Academy Award for Best Film Editing for the same film.  In a 2003 interview to Channel 4, Rezende has described the editing process of "City of God", saying he tried to "provoke differing sensations in each of the film's phases".  In addition to the international nominations and awards received for "City of God", Rezende's editing has frequently been recognized by regional awards in his native Brazil and in Argentina.  Rezende has also given a master editing class at the prestigious international film school EICTV in 2011. United 93 is a 2006 biographical drama-thriller film written, co-produced and directed by Paul Greengrass, that chronicles events aboard United Airlines Flight 93, which was hijacked during the September 11 attacks of 2001.  The film attempts to recount with as much veracity as possible (there is a disclaimer that some imagination had to be used) and in real time (from the flight's takeoff) what has come to be known in the United States as a critical moment.  According to the filmmakers, the film was made with the cooperation of all of the passengers' families.  The majority of the film is presented in real time. Tom Cross is an American television and film editor.  He began his career in 1997 as an assistant editor, contributing to such diverse projects as "We Own the Night" (2007), "Crazy Heart" (2009), "The Switch" (2010) and the Primetime Emmy Award-winning drama series "Deadwood".  He came to worldwide prominence in 2015 when he won the Independent Spirit Award for Best Editing, BAFTA Award for Best Editing, and Academy Award for Best Editing (among other honors) for his work on the acclaimed film "Whiplash" (2014).  He has cited "The Wild Bunch" (1969) and "The French Connection" (1971) as influences on the editing of this film, and reunited with writer/director Damien Chazelle on the romantic comedy "La La Land" (2016). John Gilbert is a film editor who works primarily in New Zealand.  Gilbert has edited 17 feature films as well as television shows and short films.  He won the Academy Award for Best Film Editing and the BAFTA Award for Best Editing, among several honors, for Mel Gibson's war drama "Hacksaw Ridge" (2016).  Gilbert had earlier received various accolades for his work on Peter Jackson's "" (2001), including the Satellite Award for Best Editing and nominations for an Academy Award, a BAFTA Award and an ACE Eddie Award.
Answer: Paul Greengrass