The United States on Tuesday imposed sanctions on a money exchanger and a group of firms across six countries involved in commodity shipments and business transactions that benefit Iran's military and the Houthi militias in Yemen and the Hezbollah party in Lebanon. The Treasury Department's Office of Foreign Assets Control sanctioned six firms, two tankers and a money exchanger, all either based or registered in Liberia, India, Vietnam, Lebanon or Kuwait. They are accused of materially benefiting Iran, the Houthis and Hezbollah.