Image Library Photo Library Film Library Back to gallery list Heba Aly/IRIN Friends, family and colleagues of aid workers killed in the course of humanitarian work lay a rose with the name of their loved one during a memorial outside Westminister Abbey in London on 18 August 2015 in the lead-up to World Humanitarian Day. Date Monday, August 17, 2015 Image ID 201508182308350234 Credits Heba Aly/IRIN Themes Conflict