Question: The American podcaster, author, martial artist and retired United States Navy SEAL Jocko Willink worked with this United States Navy SEAL veteran and sniper born in 1974 served how many tours in Iraq?

Context paragraphs:
Kevin Lacz: 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).

Kristin Beck: 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.

Jocko Willink: John "Jocko" Willink (September 8, 1971) is an American podcaster, author, martial artist and retired United States Navy SEAL.  He received the Silver Star and Bronze Star for his service in the Iraq War.  Willink was commander of SEAL Team Three's Task Unit Bruiser during the Battle of Ramadi.  Other notable members of Task Unit Bruiser included Leif Babin, Ryan Job, JP Dinnell, Marc Alan Lee, Michael Monsoor, Kevin Lacz and Chris Kyle.

Edward Byers: Edward C. Byers, Jr. (born August 4, 1979) is a United States Navy SEAL who received the Medal of Honor on February 29, 2016 for the rescue of a civilian in Afghanistan in 2012.  He is the most decorated living U.S. Navy SEAL.  Along with United States Army Major William D. Swenson, he is one of two Medal of Honor recipients serving on active duty.

Frank Hoagland: 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 Webb (author): 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".

Howard E. Wasdin: 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.

Jeffrey Eggers: Jeff Eggers formerly served in the White House for six years, most recently as President Obama’s Special Assistant for National Security Affairs.  Eggers retired from the Navy in 2013 after a 20 year career as a U.S. Navy SEAL (1993-2013).  His many operational tours included several SEAL Teams, commander of the Special Operations Task Unit in western Iraq, and Operations Officer and Mission Commander for the U.S. Navy’s undersea special operations command.  From his time as a SEAL, he has extensive combat and leadership experience.  Eggers also served as the National Security Council’s Senior Director for Afghanistan and Pakistan for four years.

Chris Kyle: 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.

Richard Marcinko: Richard "Dick" Marcinko (born November 21, 1940) is a former United States Navy officer.  A retired U.S. Navy SEAL commander and Vietnam War veteran, he was the first commanding officer of SEAL Team Six and Red Cell.  After retiring from the United States Navy, he became an author, radio talk show host, military consultant, and motivational speaker.

Supporting paragraphs: Jocko Willink Chris Kyle
Answer: four