U.S. Secretary for Defense, Jim Mattis, sits opposite Britain's Secretary of State for Defence, Gavin Williamson, before a meeting at the Ministry of Defence Ministry of Defence in central London

U.S. Secretary for Defense, Jim Mattis, sits opposite Britain’s Secretary of State for Defence, Gavin Williamson, before a meeting at the Ministry of Defence Ministry of Defence in central London

US Secretary for Defense, Jim Mattis in a November 10, 2017 file photo. Photo: Reuters/Simon Dawson

January 25, 2018 4:43 PM (UTC+8)