The U.S. launched airstrikes against Houthi rebel positions to deter them from targeting Israeli ships, while Iran and Russia have been accused of supporting the Houthis, and the U.S. has

U.S. President Donald Trump said on Monday he would hold Iran responsible for any attacks carried out by the Houthi group that it backs in Yemen, as his administration expanded the biggest U.S. military operation in the Middle East since Trump returned to the White House.