ANKARA, Turkey (AP) — Houthi rebels in Yemen said they attacked Saudi oil facilities. Iran supports armed groups across the Middle East that allow it to project power far beyond its borders. Here’s a look at why so many fronts seem to be heating up at once. The U.S. has struck Iran in response, saying the strait should be open to all international traffic, as it was before the U.S. and Israel attacked Iran on Feb. 28. When the U.S. strikes Iran, Iran retaliates by firing missiles and drones against Arab countries hosting U.S. forces, like Jordan and Kuwait.