Question: What Vietnam War veteran was associated with Within the Rock?

Context articles: The Boys in Company C
Robert Mason (writer)
Luis J. Landin
Vietnam Veterans Memorial (The Wall-USA)
Within the Rock
Harry G. Summers Jr.
G. R. Point
Craig E. Williams
Dale Dye
The Park Is Mine (1986 film)

The Boys in Company C, directed by Sidney J. Furie, starring Stan Shaw, Andrew Stevens, Craig Wasson, James Canning, and Michael Lembeck, is a 1978 film about United States Marine Corps recruits preparing for duty, and their subsequent combat in the Vietnam War.
 It was among the first Vietnam War films to appear after the Vietnam Era, and was also the first role for R. Lee Ermey of "Full Metal Jacket" fame.
 "The Boys in Company C" is the first in Furie's Vietnam War motion picture trilogy, followed by 2001's "Under Heavy Fire" and 2006's "The Veteran".
Robert C. Mason (born March 20, 1942) is a Vietnam War veteran and author of several books, including his first, best-selling memoir: "Chickenhawk" (1983).
 Mason piloted Huey "Slicks" in the United States Army as a Warrant Officer 1.
 He sailed to Vietnam with the 1st Cavalry Division (Airmobile) and served a one-year tour, nine months with the "First Cav", the last three months with the 48th Aviation Company.
Luis Jorge Landin (May 26, 1930 – August 26, 2010), was a Mexican-American Korean War and Vietnam War veteran who has received numerous decorations for his bravery in both wars.
 Landin completed three tours of combat duty while in Vietnam and is known as Laredo's most decorated war hero.
The Vietnam Veterans Memorial (The Wall-USA) is an on-line Vietnam War memorial.
 It was started in 1996 by the veteran Alan Oskvarek who became disabled in the Vietnam War.
 It is now run by unpaid volunteers of the "4th Battalion 9th Infantry Regiment Manchu (Vietnam) Association" on a not-for-profit basis, and is supported by voluntary contributions.
 It uses the U.S.A. government's official database.
 The website has a search facility for names on the granite panels on the Vietnam War Memorial in Washington DC, USA.
 In 2006 the website reported at total of over 65,000 remembrances and photographs.
Within the Rock, is a 1996 science fiction horror film/monster movie/slasher TV-Movie directed by Gary J. Tunnicliffe produced among others; actor, Robert Patrick and filmed in the USA.
 It starred Xander Berkeley, Brian Krause, Duane Whitaker and a cameo from former U.S. Marine Corps captain and technical advisor, Dale Dye.
Harry G. Summers Jr. (May 6, 1932 – November 14, 1999) is best known as the author of the neo-Clausewitzean analysis of the Vietnam War titled, "On Strategy: A Critical Analysis of the Vietnam War" (1982).
 Summers was an infantry colonel in the United States Army, and had served as a squad leader in the Korean War and as a battalion and corps operations officer in the Vietnam War.
 Colonel Summers was also an instructor and Distinguished Fellow at the Strategic Studies Institute at the U.S. Army War College in Carlisle, Pennsylvania, and served on the negotiation team for the United States at the end of the Vietnam War.
G. R. Point is a play about the Vietnam War, by American playwright and Vietnam war veteran David Berry.
Craig E. Williams is an American Vietnam War veteran from Kentucky and co-founder of the Vietnam Veterans of America Foundation.
 Williams was awarded the Goldman Environmental Prize in 2006 for his efforts on convincing The Pentagon to stop plans to incinerate decaying caches of chemical weapons stockpiled around the United States.
 The Vietnam Veterans of America Foundation, along with other groups that formed International Campaign to Ban Landmines, received Nobel Peace Prize in 1997.
Captain Dale Adam Dye Jr., USMC (Ret.)
 (born October 8, 1944) is an American actor, technical advisor, radio personality and writer.
 A decorated Marine veteran of the Vietnam War, Dye is the founder and head of Warriors, Inc., a technical advisory company specializing in portraying realistic military action in Hollywood films.
 Dye has also offered his expertise to television, such as the HBO miniseries "Band of Brothers" and "The Pacific", and video games, including the "Medal of Honor" series.
The Park Is Mine is a Canadian-American drama television film based on the novel of the same name by Stephen Peters.
 The film focuses on Vietnam War veteran, Mitch (Tommy Lee Jones), who takes forceful control of Central Park to remember those who served and died in the Vietnam War and draw attention to veterans' issues.