GAZA CITY, GAZA - APRIL 21: Mousa Abu Marzook, one of the leader of Hamas, comes to Gaza from Rafah Border Gate in order to join National Agreement Works in Gaza City, Gaza on 21 April, 2014. Marzook meets with Palestine President Ismail Haniyeh (on the photo). (Photo by Mustafa Hassona/Anadolu Agency/Getty Images)