War rains down from the sky in Yemen, where an aerial bombing campaign by Saudi-led and American-backed coalition hammers much of the north. The U.S. military supports the campaign against the Houthi rebels with logistics and intelligence, and sells the Saudis many of the bombs it drops on that country. In the mountains outside the capital, we gained exclusive access to the site where the Houthis store unexploded American-made bombs, like this 2000 pound Mark 84 bomb made in Garland, Texas. It landed in the middle of the street in the capital, we are told. The Houthis also let us see a storage site with the remains of American-made cluster bombs. Cluster bombs are amongst the most deadly to civilians, filled with baseball-sized smaller bombs that scatter over a larger area. Any that don't explode stay where they fell, primed, and often wounding civilians like land mines. Deep into Yemen's countryside ... I found a Doctors Without Borders cholera treatment center completely destroyed by an airstrike the day before. It was just about to open its doors to patients. The war has made it harder for people to access clean running water, leading to the worst cholera outbreak in modern history. Most people here, whether they support the Houthis or not, know that many of the bombs being dropped are American. It provides a strong propaganda tool for the Houthi rebels, who go by the slogan Death to America."