Question: Which American film maker is an Iraq War veteran, Chris Mandia or Bryan Singer?

Context paragraphs:
Paul Stanton (politician): Paul Anthony Stanton is an Iraq war veteran, computer programmer, and former Libertarian candidate for US Senate in Florida in 2016.  After serving in the Army, he protested the wars in Iraq and Afghanistan, and with the American Civil Liberties Union, he sued an airport for his right to hand out copies of the U.S. Constitution in protest of Transportation Security Administration policies.

Tristan Dyer: Tristan Dyer is an American film director, stop-motion animator, and Iraq war veteran from Waldoboro, Maine.

Casey Owens: Casey Owens (born c. 1981 − October 15, 2014) was a United States Marine, Iraq War veteran, and paralympic athlete from Houston, Texas, United States.  He is best known for completing marathons in a wheelchair after his legs were amputated due to the injuries received while on a rescue mission during the Iraq War.

John Crawford (author): SPC John Crawford is an American Iraq War veteran and writer originally from Palatka, Florida known for his bestselling memoir "The Last True Story I'll Ever Tell", about his tour in Iraq.  In the early 2000s, Crawford, already an Army veteran, had enlisted in the Army National Guard to help pay for his college tuition.  Because he already held an associate degree from Tallahassee Community College, he was assigned the rank of Specialist.

Max Yashirin: Max Yashirin (born September 30, 1982) is an Iraq War Veteran who ran for U.S. Congress in Nebraska's 1st congressional district.  He was one of two Iraq War veterans running for office in Nebraska in 2008, and ran unopposed in the primaries.  Yashirin was defeated in the general election by Republican incumbent Jeff Fortenberry.

Bryan Singer: Bryan Jay Singer (born September 17, 1965) is an American film director, film producer, writer, and actor.  He is the founder of Bad Hat Harry Productions and he has produced or co-produced almost all of the films he has directed.

Bryan Lentz: Bryan Roy Lentz (born June 5, 1964) is a private attorney in Philadelphia, Pennsylvania.  He is the former Pennsylvania State Representative for the 161st legislative district (2007–2010), and he was the 2010 Democratic nominee for U.S. Representative for Pennsylvania 's 7 congressional district .  He is an Iraq War veteran and former prosecutor.

Bryan Bender: Bryan Bender (born 1972) is an American journalist.  Bender is the defense editor for POLITICO Pro ; previously a D.C.-based reporter for the Boston Globe and Jane’s Defence Weekly, he covered U.S. military operations in the Middle East, Asia, Latin America, and the Balkans.  He also writes about terrorism, the international arms trade, and government secrecy.  He is author "You Are Not Forgotten", the story of an Iraq War veteran’s search for a missing World War II fighter pilot in the jungles of New Guinea.  He is a board member of the Military Reporters and Editors Association.

Chris Mandia: Chris Mandia is an American playwright, screenwriter, film director, and Iraq War veteran from San Pedro, California.  He was an U.S. Marine infantryman and served two combat tours in Iraq, including the battle for Fallujah.  Mandia has won numerous awards for his work and received a Jack Nicholson scholarship to attend the MFA program at the University of Southern California’s film school.  In 2010, he received an Operation In Their Boots fellowship and “Get Some,” a film he authored, was a Cannes Film Festival selection.  In 2012 he co-wrote the multimedia physical theatre piece, "Trajectories: Transformations" with Meron Langsner for Evet Arts.  The piece was based on interviews with servicemen from the Iraq and Afghanistan wars and was performed in Boston and Chicago.

Todd Lowe: Todd Lowe (born May 10, 1977) is an American actor.  He is best known for his role as Terry Bellefleur, a PTSD-suffering Iraq War veteran who works as a short order cook at Merlotte's Bar & Grill., on HBO's "True Blood" and as Zach Van Gerbig on "Gilmore Girls".  In 2017 he played the role of Colin Dobbs, another war veteran, in five episodes of the "USA Network" series "Shooter (TV series)", based on the 2007 film of the same name and the novel "Point of Impact" by Stephen Hunter

Supporting paragraphs: Chris Mandia Bryan Singer
Answer: Chris Mandia