Open this photo in gallery: Fire and smoke rise next to charred vehicles following a U.S. strike on the Ras Isa fuel port, Yemen, in this screengrab from a handout video released on April 18.AL-MASIRAH TV/Reuters U.S. air strikes targeting an oil port held by Yemen’s Houthi rebels killed 74 people and wounded 171 others, the group said Friday, marking the single-deadliest known attack under President Donald Trump’s new campaign targeting the rebels. Assessing the toll of Trump’s campaign, which began March 15, has been incredibly difficult as the U.S. military’s Central Command so far has not released any information...