EXPLAINER: Who are Yemen's Houthis and why are they under attack by the US?

US President Donald Trump has launched the biggest military operation in the Middle East since taking office against Yemen's Iran-aligned Houthis after they resumed Red Sea shipping attacks.

EXPLAINER: Who are Yemen's Houthis and why are they under attack by the US?

US President Donald Trump has launched the biggest military operation in the Middle East since taking office against Yemen's Iran-aligned Houthis after they resumed Red Sea shipping attacks.