Yemeni members of the southern separatist movement, loyal to President Abedrabbo Mansour Hadi, gather around an armed pick up truck in Aden’s suburbs, on June 3, 2015. The United States confirmed that an American envoy has held talks in Oman with Iran-backed Yemeni rebels to convince them to attend a Geneva peace conference in mid-June. AFP PHOTO / SALEH AL-OBEIDI