Saudi Arabia intercepted a barrage of Houthi missiles and drones on Sunday, including a ballistic missile and drone aimed at Riyadh and a cruise missile targeting the southwestern city of Khamis Mushait. Coalition spokesman Major-General Turki al-Maliki confirmed the shootdowns, followed by 10 additional ballistic missiles fired at southern Saudi territory. Explosions were heard across the capital. The attacks came as Riyadh's King Khalid International Airport attempted to resume operations after a devastating Houthi strike on October 10 killed 13 people and wounded more than 300. Terminal 2 reopened for international flights Sunday, with Terminal 1 handling domestic traffic. Houthi military spokesman Yahya Saree immediately declared the airport "unsafe" and a continuing "military target," warning airlines and travelers to stay away. On Saturday, the Houthis claimed strikes on three Saudi airports, energy installations, a pipeline, and an airbase. Saudi civil defense responded to falling debris in the Mecca and Medina regions after intercepting two missiles. The Houthis denied targeting Islam's two holiest cities, calling the Saudi accusation a "huge lie" — a politically explosive charge given the symbolic weight of those sites. Inside Yemen, the ground war is tightening around Taiz. Houthi fighters advanced on Jabal Sabr, the strategic mountain overlooking the city, while besieging Taiz itself and cutting the main road to Aden, the interim capital of Yemen's internationally recognized government. The United Nations warned that "time is running out" to deliver aid to the 800,000 people trapped inside. Yemen's government forces reported conducting more than 700 operations against Houthi targets on Saturday, claiming over 300 enemy fighters killed. Fighting has intensified across multiple fronts after the Houthis seized strategic territory along the Red Sea coast last month, a move that shifted the war's momentum. The broader extraction pattern is clear: the Houthis leverage Iranian-supplied missile and drone technology to impose costs on the world's largest crude oil exporter, disrupting commercial aviation, energy infrastructure, and Saudi Arabia's carefully cultivated international image. Saudi Arabia absorbs these costs through air defense expenditures and economic disruption, while Yemeni civilians — particularly in besieged Taiz — bear the heaviest burden with no exit. The war's intensification creates a self-reinforcing cycle: each Houthi escalation demands a coalition response, each response fuels Houthi recruitment narratives, and the humanitarian catastrophe deepens with every turn. No generative outcome is emerging from this cycle. Both sides are consuming military and economic resources at accelerating rates with no political settlement in sight. The 800,000 trapped in Taiz and the broader Yemeni civilian population are the terminal cost-bearers in a conflict where every party's strategy depends on sustained escalation.