Attacks on airports in Saudi Arabia by Yemen's Iran-backed Houthis have pushed tensions in the region sharply higher. The strikes reached Riyadh's airport, a target that alarmed officials because of what it means for civilian aviation. President Trump said after the attack that the United States was weighing the possibility of Saudi Arabia joining the military operation against the Houthis in Yemen. Any such move would widen a conflict that has already drawn in several outside powers. Governments across the region reacted quickly and in strong language. Turkey, Egypt, Pakistan and Saudi Arabia condemned the Houthi attacks on Riyadh in the strongest terms. The risk now is that strikes on national infrastructure pull still more countries directly into the fighting.