Will the rolling fireball in Iraq ignite an all-out regional war?

Early Tuesday, Anbar woke up to a devastating airstrike that killed the PMF's Anbar operations commander and six others. The strike, bearing the undeniable fingerprints of the United States, has pushed tensions to a boiling point.

The blowback was immediate. Armed factions vowed to escalate their drone campaigns against US interests. It's a vicious cycle of retaliation, making Iraq the hottest theater in this regional war of attrition.