By Michael Georgy, Jana Choukeir and Maha El Dahan
DUBAI, Sept 16 – AbdulMalik al-Houthi, an elusive figure who commands a battle-hardened force, scored his biggest military victory in years when his Iran-aligned Houthi militant group swept through Yemen’s Red Sea coastline and tightened their grip on a vital shipping waterway, rattling oil superpower Saudi Arabia.