Here's the scene last week: Army Delta Force troops, in boots on the ground in Iraq, swooping into an ISIS prison camp along with Kurdish and Iraqi soldiers. The mission: Free more than five dozen Kurdish and Iraqi captives believed in imminent danger of mass execution. In the darkness, a fierce firefight erupts. The Kurdish and Iraqi break-in stalls. The experienced Special Ops guys, who happen to be heavily-armed in body armor, night-vision goggles and full combat gear, open up. Numerous ISIS troops fall. So does one U.S. operative, Master Sgt. Joshua Wheeler, a veteran of 14 deployments. They breach...