President Donald Trump boards Air Force One, Wednesday, March 18, 2026, at Dover Air Force Base, Del., after attending the casualty return for the six crew members of an Air Force refueling aircraft who died when their plane crashed in western Iraq while supporting operations against Iran. (AP Photo/Julia Demaree Nikhinson)

President Donald Trump arrives with Defense Secretary Pete Hegseth, Chairman of the Joint Chiefs of Staff Gen. Dan Caine and members of Congress, on Air Force One, Wednesday, March 18, 2026, at Dover Air Force Base, Del., to attend the casualty return for the six crew members of an Air Force refueling aircraft who died when their plane crashed in western Iraq while supporting operations against Iran. (AP Photo/Julia Demaree Nikhinson)

President Donald Trump arrives on Air Force One, Wednesday, March 18, 2026, at Dover Air Force Base, Del., to attend the casualty return for the six crew members of an Air Force refueling aircraft who died when their plane crashed in western Iraq while supporting operations against Iran. (AP Photo/Julia Demaree Nikhinson)

House Speaker Mike Johnson of La., is directed to a vehicle after arriving with President Donald Trump on Air Force One, Wednesday, March 18, 2026, at Dover Air Force Base, Del., to attend the casualty return for the six crew members of an Air Force refueling aircraft who died when their plane crashed in western Iraq while supporting operations against Iran. (AP Photo/Julia Demaree Nikhinson)

President Donald Trump greets Col. Matha "Jeannie" Sasnett, commander of Air Force Mortuary Affairs, as he arrives on Air Force One, Wednesday, March 18, 2026, at Dover Air Force Base, Del., to attend the casualty return for the six crew members of an Air Force refueling aircraft who died when their plane crashed in western Iraq while supporting operations against Iran. (AP Photo/Julia Demaree Nikhinson)