U.N. seeks $2.4 billion for Yemen, warns aid operation nearly broke

U.N. agencies trying to help the millions at risk from the conflict in Yemen are nearly broke, U.N. aid chief Mark Lowcock said on Thursday, announcing a drive to raise some $2.4 billion next week to pay for the world biggest aid operation.Around 80% of Yemen's population - 24 million people - need aid.The country has been mired in conflict since the Iran-allied Houthi group ousted Yemen's government from the capital Sanaa in 2014.