British Prime Minister Theresa May (C) Saudi King Salman bin Abulaziz Al-Saud (L) and Bahrain's King Hamad biin Isa Al Khalifa walk out togeter after a group photo with the Gulf Cooporative Council's (GCC) leaders during the first GCC British Summit, in Sakhir Palace Bahrain, December 7, 2016. REUTERS/Hamad I Mohammed