Why doesn't the US intervene to defend Saudi Arabia against the Houthis?

Authorities issued warnings for city in first such alerts for Riyadh since fighting with Iran-backed Houthis escalated in July Yemen’s Houthis said they attacked “sensitive” sites in the Saudi capital with missiles and drones, hours after flames and a large plume of black smoke were seen rising above Riyadh airport on ...

Yemen's Iran-backed Houthis have claimed responsibility for missile and drone attacks targeting "sensitive" sites in Saudi Arabian capital Riyadh - hours after flames and smoke were seen near the city's main airport.

Saudi Arabia said Yemen's Houthi rebels tried to attack Riyadh with a ballistic missile, the first time its capital has been targeted since the escalation in fighting with the Iran-backed rebels.

Fighting between Iran-backed Houthi rebels and Saudi Arabia continues to intensify. On Saturday morning, a fire broke out near Riyadh's main airport after Houthis said they launched missiles and drones at Saudi Arabia. On the ground in Yemen, Houthi rebels are pushing east in their fight against Saudi-backed government...

The US cautioned against a rapidly escalating situation in Yemen after Houthi rebels carried out a missile attack on the Saudi capital. In recent weeks, the Iran backed militants have also seized large portions of Yemeni territory following clashes with Saudi-backed government forces. The US is a very close ally to Sau...