In his new book, former head of the Defense Intelligence Agency Lt. Gen. Michael Flynn (Ret.) writes that extremists in al Qaeda and specifically the al Qaeda franchise in Iraq that later became ISIS were “sick, psychopathic foes.”

“[W]e were facing a despicable foe, one who would rape and pillage women and children, boys and girls, behead for fun, all while watching pornography on their laptops,” Flynn writes, after describing U.S. efforts in Iraq in the mid-2000s. “In fact, at one point, we determined that 80 percent of the material on the laptops we were capturing was pornography.”

A current counterterrorism official and a former intelligence analyst told ABC News that while they couldn’t speak to the 80 percent figure, in their experience pornography was often found on jihadists’ computers.

“Some of it was really bad, and it was all over the map. Some of it was kids, animals,” said the former analyst.