The US announces "progress" in fighting PISSI, but the supposed progress may not mean anything .

The US tends to label any "military-age males" killed by air strikes as enemy fighters, but that's definitely an exaggeration. If air strikes in Ramadi killed 350 military-age males, we have no idea how many were fighting for PISSI and how many were civilians.

The caution of the army attacking Ramadi is likely to result in fewer casualties to soldiers, but could cause more casualties to civilians in Ramadi, which would build support for PISSI.

As for a few leaders killed, such a group can always replace them as long as more people are volunteering.