Millions of Yemenis lost everything — homes, jobs, loved ones — in nearly four years of civil war. The conflict has pushed the country of 29 million people to the brink of famine. At least 8 million have no food other than what aid agencies provide. The figure is likely to rise to 11.5 million as more people become unable to afford food because the worsening economic crisis caused by the war, UN agencies warn. The currency is crumbling in value, sending prices soaring. The humanitarian disaster has come as the U.S.-backed Saudi-led coalition since 2015 has waged a relentless campaign of airstrikes and imposed a blockade, aiming to uproot Shiite rebels known as Houthis, who took over northern and central Yemen. Besides airstrikes, northern Yemen has also seen heavy barrages back and forth across the border with Saudi Arabia as Saudi forces battle rebels. Yahia Hussein has already lost a 5-month-old son who wasted away and died as they fled their village in northern Yemen. Now living in a camp for the displaced, he is running out of ways to feed his other four children. Jobless, he has no way to afford food, and he says he hasn't received international aid for several months. His wife gives their children moldy bread crumbs mixed with water and salt. Some days she feeds them a paste made of boiled leaves from a vine called "halas."