JOINT BASE ANDREWS, Md. — President Donald Trump was paying tribute Saturday to the four Americans killed in a suicide bomb attack in Syria this week as he set off to Dover Air Force Base for the return of their remains. The trip was not listed on the president’s public schedule that was released Friday night, but he tweeted the news before his Saturday morning departure from the White House. “Will be leaving for Dover to be with the families of 4 very special people who lost their lives in service to our Country!” he wrote. Will be leaving for Dover to be with the families of 4 very special people who lost their lives in service to our Country! — Donald J.