Did the Middle East just open another front? U.S. and Saudi Arabia carried out joint strikes on Iran-backed militias in Iraq after repeated drone attacks targeting American forces and Saudi oil infrastructure. Iraq has reacted sharply, while Iran accuses Washington and Riyadh of expanding the war. Here's everything we know about the rapidly escalating regional crisis.

Iran-backed militants in Iraq recently launched over two dozen drone attacks on US forces and Saudi energy infrastructure.

Iraqi militias backed by Tehran are the latest targets in the ever-expanding conflict.