DUBAI, United Arab Emirates (AP) — U.S. airstrikes 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 on the campaign, its specific targets and how many people have been killed. Meanwhile, Yemen’s Houthi rebels strictly control access to areas attacked and don’t publish information on the strikes, many…