Question: American Sniper  is loosely based on the memoir by Scott McEwen and Jim DeFelice and what United States Navy SEAL veteran and sniper born in 1974
Context: Dr. Howard E. Wasdin (born Howard E. Wilbanks on November 8, 1961) is a former member of the United States Navy who served as a sailor in the Atlantic Fleet as well as a Navy SEAL.  Following his honorable discharge, he co-wrote the autobiographical memoir "SEAL Team Six: Memoirs of an Elite Navy SEAL Sniper".  He also wrote "I Am a SEAL Team Six Warrior: Memoirs of an American Soldier".  Wasdin served in operation Desert Storm and was part of the operation to capture Mohamed Farrah Aidid, a Somalian warlord.  It was in the operation that Wasdin was shot and almost lost his leg.  After 12 years of service, he now lives in Georgia where he operates a chiropractic clinic. Kristin Beck (June 21, 1966) is a retired United States Navy SEAL who gained public attention in 2013 when she came out as a trans woman.  She published her memoir in June 2013, "Warrior Princess: A U.S. Navy SEAL's Journey to Coming out Transgender", detailing her experiences. Taya Renae Kyle (née Studebaker, born September 4, 1974) is an American author, political commentator, and military veteran's family activist.  Known as the widow of US Navy SEAL Chris Kyle, she was portrayed by Sienna Miller in the 2014 film "American Sniper" about her husband's life.  Kyle is the co-author of "American Wife: A Memoir of Love, Service, Faith, and Renewal", a book about life with her husband. American Sniper is a 2014 American biographical war drama film directed by Clint Eastwood and written by Jason Hall.  It is loosely based on the memoir "American Sniper: The Autobiography of the Most Lethal Sniper in U.S. Military History" (2012) by Chris Kyle, with Scott McEwen and Jim DeFelice.  The film follows the life of Kyle, who became the deadliest marksman in U.S. military history with 255 kills from four tours in the Iraq War, 160 of which were officially confirmed by the Department of Defense.  While Kyle was celebrated for his military successes, his tours of duty took a heavy toll on his personal and family life.  The film was produced by Eastwood, Robert Lorenz, Andrew Lazar, Bradley Cooper, and Peter Morgan.  It stars Cooper as Kyle and Sienna Miller as his wife Taya, with Luke Grimes, Jake McDorman, Cory Hardrict, Kevin Lacz, Navid Negahban, and Keir O'Donnell in supporting roles. Frank Hoagland is an American politician, business owner, and retired United States Navy SEAL.  He was elected to the Ohio Senate in 2016 to represent the 30th District, and will take office in January 2017.  He owns 360 Safe Solutions, a security consulting firm, and Special Tactics and Rescue Training (START) LLC, a security training provider, both based in Mingo Junction, Ohio.  He previously served in the United States Navy as a Navy SEAL. Brandon Tyler Webb (born 1974) is a former United States Navy SEAL and SEAL Sniper Head Instructor, with one combat deployment to Afghanistan and one to Iraq.  He served as the Navy SEAL Sniper Course Manager, where he developed new curricula and trained snipers, including Chris Kyle.  He is the editor in chief of SOFREP and a media commentator on snipers and related Special Operations Forces military issues.  Webb is the co-author of "The 21st Century Sniper: A Complete Practical Guide".  He is the author of "The Red Circle", his memoir, and "The Making of a Navy Seal". Kevin “Dauber” Lacz is a United States Navy SEAL veteran who served two tours in the Iraq War with SEAL Team 3.  His platoon's 2006 deployment to Ramadi has been discussed in several books, including Dick Couch’s "The Sheriff of Ramadi", Jim DeFelice’s "Code Name: Johnny Walker", and Chris Kyle's New York Times best-selling autobiography, "American Sniper".  Lacz’s presence in the book led to his involvement in the production of and eventual casting in the Clint Eastwood-directed Oscar-winning biopic of the same name (starring Bradley Cooper). Christopher Scott "Chris" Kyle (April 8, 1974 – February 2, 2013) was a United States Navy SEAL veteran and sniper.  Kyle served four tours in the Iraq War and was awarded several commendations for acts of heroism and meritorious service in combat.  He was awarded one Silver Star Medal, four Bronze Star Medals with "V" devices, a Navy and Marine Corps Achievement Medal and numerous other unit and personal awards. Leadership Secrets of the Rogue Warrior: A Commando's Guide to Success is a book by United States Navy SEAL veteran Dick Marcinko, together with ghost writer John Weisman.  In the book, Marcinko looks into the world of business management.  Loaded with examples, both military and civilian, the book aims to serve as a self-help guide for lower management to rise through the corporate ranks. American Sniper: The Autobiography of the Most Lethal Sniper in U.S. Military History is an autobiography by United States Navy SEAL Chris Kyle, written with Scott McEwen and Jim DeFelice.  With 255 kills, 160 of them officially confirmed by the Pentagon, Kyle is the deadliest marksman in U.S. military history.  The book was published by William Morrow and Company on January 2, 2012 and appeared on "The New York Times" Best Seller list for 37 weeks.
Answer: Chris Kyle