A week after a daring raid against ISIS that freed 70 Kurdish hostages and left an American special forces operator dead, NBC News has obtained what it says is body-cam footage from the assault.

In his impressive new book Relentless Strike, author Sean Naylor chronicles the sprawling history of the Joint Special Operations Command, or JSOC, America’s special forces killing apparatus. It’s filled with anecdotes of both bravery and waste, but one in particular stands out: In the aftermath of 9/11, the Pentagon…