 Complete the following phrase:  World Humanitarian Day is an international day dedicated to recognize humanitarian personnel and those who have lost their lives working for humanitarian causes. It was designated by the United Nations General Assembly as part of a Swedish-sponsored GA Resolution A63L.49 on the Strengthening of the Coordination of Emergency Assistance of the United Nations, and set as 19 August. It marks the day on which the then Special Representative of the Secretary-General to Iraq, Sérgio Vieira de Mello and 21 of his colleagues were killed in 