50,000 flee Houthi advance in Yemen

Nearly 50,000 people have fled a sudden advance by Houthi forces in western Yemen, aid workers say. Entire villages have been emptied, and families are trapped near frontline fighting with food supplies running low. Civilians in the Middle East's poorest country are caught in a global struggle for control of one of the world's most important shipping routes — the Bab al-Mandab strait. Aid workers warn the fighting threatens to turn Yemen's on-off conflict into a forever war.