The United States has hit more than 800 targets in Yemen since mid-March, killing hundreds of Houthi rebel fighters, including members of the group's leadership, the US military says. Washington's forces have hammered the Iran-backed Houthi rebels with near-daily air strikes since March 15 in an operation dubbed 'Rough Rider,' seeking to end the threat they pose to vessels in the Red Sea and Gulf of Aden and reestablish US regional 'deterrence.' Despite the strikes, the Houthis -- who control large swaths of Yemen and have been at war with a Saudi-led coalition backing the internationally recognized government since 2015 -- have continued to claim attacks against both US vessels and Israel.