The Pentagon insisted on Monday that said the U.S. strategy against the Islamic State in Iraq and Syria is working, despite the fall of a key Iraqi city.

“We still believe the strategy is working,” Pentagon spokesman Army Col. Steve Warren told reporters.

“Ramadi is an urban environment that is among the very toughest to fight in,” Warren added in an acknowledgement that U.S. air power alone is no panacea for the city. “It is an environment that limits the ability of airpower, so it creates unique challenges,” he said. […]