President Donald Trump on Wednesday honored the lives of four U.S. service members who were killed in the Middle East and returned to their families at an air force base in Delaware. The president saluted as four transfer cases were escorted off an airplane during the dignified transfer at Dover Air Force Base. The ritual is one of the most somber duties of a commander-in-chief. It was the third Trump has attended since he launched the war in Iran in February. Trump was scheduled to meet privately with the grieving families. Speaking to reporters on his way to Dover, Trump called the ritual “one of the hardest things to do as a president."