After finally choosing to view the barbaric, on-camera beheading by ISIS of freelance war correspondent James Foley, I have been left with a level of rage known only to those of us who have sacrificed unspeakable offerings on the altar of world peace. My offering was my only son — Aaron Carson Vaughn. Aaron was a member of SEAL Team VI. He was killed in action when a CH47D Chinook, carrying thirty Americans and eight Afghans was shot down in the Tangi River Valley of Afghanistan on Aug. 6, 2011. Many times over the past three years, I have been...