Yemen's Houthi rebels on Saturday claimed shooting down another of the U.S. military's MQ-9 Reaper drones, airing footage of parts that corresponded to known pieces of the unmanned aircraft. The Houthis said they shot down the Reaper with a surface-to-air missile, part of a renewed series of assaults this week by the rebels after a relative lull in their pressure campaign over the Israel-Hamas war in the Gaza Strip.