Question: What movie was created with the skills of Don L. Harper and produced by Walt Disney Pictures?

Context paragraphs:
List of Walt Disney Pictures films: This is a list of films released theatrically under the Walt Disney Pictures banner (known as that since 1983, with "Never Cry Wolf" as its first release) and films released before that under the former name of the parent company, Walt Disney Productions (1929–1983).  Most films listed here were distributed in the United States by the company's distribution division, Walt Disney Studios Motion Pictures (formerly known as Buena Vista Distribution Company [1953–1987] and Buena Vista Pictures Distribution [1987–2007]).  The Disney features produced before "Peter Pan" (1953) were originally distributed by RKO Radio Pictures, and are now distributed by Walt Disney Studios Motion Pictures.

Walt Disney Pictures: Walt Disney Pictures, Inc. is an American film production company and a subsidiary of Walt Disney Studios, owned by The Walt Disney Company.  The division is based at the Walt Disney Studios in Burbank, California, and is the main producer of live-action feature films within the Walt Disney Studios unit.  It took on its current name in 1983.  Today, in conjunction with the other units of Walt Disney Studios, Walt Disney Pictures is classified as one of Hollywood's "Big Six" film studios.  Films produced by Walt Disney Animation Studios and Pixar Animation Studios are also released under this brand.

Don L. Harper: Don Loren Harper is a Los Angeles-based film composer, songwriter, conductor, and arranger whose credits include films such as "The Guardian", "National Treasure", "Training Day", "Armageddon", "The Rock", "Twister", "Broken Arrow", "Assassins", and "Speed".  Harper composed and conducted the music for Disney's direct-to-video releases "The Lion King 1½", "Tarzan & Jane", and "".  He also created the scores for the television series' "The Magnificent Seven" and "The Twilight Zone", and the TV movie "Houdini".

Goof Troop: Goof Troop is an American animated comedy television series produced by Walt Disney Television Animation.  The series focuses on the relationship between single father Goofy and his son, Max; as well as their neighbors Pete and his family.  Created by Peter Montgomery, the main series of 65 episodes aired in first-run syndication from 1992 to 1993 on "The Disney Afternoon" programming block, while an additional thirteen episodes aired on Saturday mornings on ABC.  A Christmas special was also produced, which aired in syndication on November 1, 1992.  Walt Disney Pictures released two films based on the television series: the theatrical "A Goofy Movie", released on April 7, 1995; as well as the direct-to-video sequel and television series finale "An Extremely Goofy Movie", released on February 29, 2000.

Hollywood Pictures: Hollywood Pictures was an American film production label of The Walt Disney Studios, a division of The Walt Disney Company.  Similar to Disney's Touchstone Pictures and former Miramax and Dimension film labels, it produced films for a more mature adult audience than Walt Disney Pictures and Disneynature.  The label's metonym was the Sphinx.

Return to Never Land: Return to Never Land (also known as Peter Pan 2 or Peter Pan In: Return to Never Land) is a 2002 American animated musical fantasy-adventure film produced by Walt Disney Television Animation, and released by Walt Disney Pictures and distributed by Walt Disney Studios Motion Pictures.  The film is a sequel to Walt Disney Feature Animation 1953 film "Peter Pan", It is based on J. M. Barrie's novel "Peter and Wendy", and had a worldwide gross of $109 million.

Walt Disney Studios Motion Pictures: Walt Disney Studios Motion Pictures (formerly Buena Vista Pictures Distribution and Buena Vista Film Distribution Company) is an American film distributor owned by The Walt Disney Company.  Established in 1953 as Buena Vista Film Distribution Company, the company handles theatrical distribution, marketing and promotion for films produced and released by the Walt Disney Studios, including Walt Disney Pictures, Walt Disney Animation Studios, Pixar Animation Studios, DisneyToon Studios, Marvel Studios, Lucasfilm, Disneynature, and Touchstone Pictures.  The division took on its current name in late 2007, which before that had been Buena Vista Pictures Distribution since 1987.

Piglet's Big Movie: Piglet's Big Movie is a 2003 American animated musical comedy-drama adventure film produced by Walt Disney Feature Animation and animated by Walt Disney Animation (Japan).  It was released by Walt Disney Pictures on March 21, 2003.  The film is based upon the characters in the "Winnie-the-Pooh" books written by A. A. Milne.  It is the second in a recent series of theatrically released "Winnie the Pooh" films, preceded by "The Tigger Movie" (2000) and followed by "Pooh's Heffalump Movie" (2005).  In the film, Piglet is ashamed of being small and wanders off into the Hundred Acre Woods, leading his friends to form a search party to find him.

Disney Movies Anywhere: Disney Movies Anywhere is a digital film locker for Disney, Pixar, Marvel, and "Star Wars"-branded films in the United States.  It allows for the storage of digital movie rights via purchases from providers such as iTunes, Google Play, Vudu, Microsoft, Amazon Video, and Verizon Fios.  Rights to titles can also be added via redemption of Disney Movies Rewards "Magic/Action Codes" from select titles that provide either a digital HD download or digital copy.  The service allows consumers to redeem films produced by Walt Disney Pictures, Walt Disney Animation Studios, Pixar, Marvel Studios, Disneynature, and Lucasfilm, all owned by the Walt Disney Studios.  Disney Movies Anywhere allows streaming of content over the web or mobile apps, along with access to the title through the linked accounts in participating providers.  It is powered by a proprietary digital rights system called KeyChest.

National Treasure (film): National Treasure is a 2004 American adventure heist film produced and released by Walt Disney Pictures.  It was written by Jim Kouf and the Wibberleys, produced by Jerry Bruckheimer and directed by Jon Turteltaub.  It is the first film in the "National Treasure" franchise and stars Nicolas Cage, Harvey Keitel, Jon Voight, Diane Kruger, Sean Bean, Justin Bartha and Christopher Plummer.

Supporting paragraphs: Don L. Harper National Treasure (film)
Answer: National Treasure