Defense Secretary Jim Mattis stands with the British Defense Secretary Michael Fallon before a meeting at the Pentagon, July 7, 2017. (DoD photo by A

Defense Secretary Jim Mattis stands with the British Defense Secretary Michael Fallon before a meeting at the Pentagon, July 7, 2017. (DoD photo by Army Sgt. Amber I. Smith)

Defense Secretary Jim Mattis stands with the British Defense Secretary Michael Fallon before a meeting at the Pentagon, July 7, 2017.
(DoD photo by Army Sgt. Amber I. Smith)