Iranian-made missile parts bound for the Houthis after they were intercepted by US forces.U.S. Central Command via AP, FileThe Houthis possess a sizable arsenal of weapons, including missiles and drones.The Yemeni rebels couldn't have done that without foreign help, according to a new UN report.The Houthis have used these weapons to target ships in the Red Sea and Gulf of Aden.The Houthi rebels couldn't have amassed their dangerous arsenal of weapons without extensive help from Iran and its proxy forces in the Middle East, according to a new report for the United Nations.In the lengthy report, which was delivered to the UN Security Council last month, a panel of experts concluded that the Yemen-based Houthis have been receiving training, weapons, technical assistance, and financial support from Iran, Lebanese Hezbollah, and armed Iraqi groups.The Houthis are behind a yearlong campaign targeting key merchant shipping lanes in the Red Sea and Gulf of Aden.