From left to right, senior Hamas leader Moussa Abu Marzouk, senior Fatah official Azzam Al-Ahmed, head of the Hamas government Ismail Haniyeh, and deputy speaker of the Gaza-based Palestinian Parliament Ahmed Bahar attend a meting in Gaza City on April 22, 2014. Hamas and Fatah signed a deal to establish a unity government this spring, but since then little progress has been made as the Palestinian factions continue to feel deep mistrust toward one another. Photo: Abed Rahim Khatib/Flash90.