CNN.com reports: “Some in the U.S. intelligence community warn that ISIS may be working to build the capability to carry out mass casualty attacks, a significant departure from the terror group’s current focus on encouraging lone wolf attacks, a senior U.S. intelligence official told CNN on Friday.

To date, the intelligence view has been that ISIS is focused on less ambitious attacks, involving one or a small group of attackers armed with simple weapons. In contrast, al Qaeda in the Arabian Peninsula, or AQAP, has been viewed as both more focused on — and more capable of — mass casualty attacks, such as plots on commercial aviation. Now the intelligence community is divided…”