US actress and director and UN Special Envoy, Angelina Jolie (L), is greeted by Britain's Vice Chief of the Defence Staff General Gordon Messenger (R) at the UN Peacekeeping Defence Ministerial at Lancaster House in London on September 8, 2016. The meeting follows the Leaders Summit on Peacekeeping in September 2015. / AFP PHOTO / POOL / Stefan RousseauSTEFAN ROUSSEAU/AFP/Getty Images