Gaza City doctors are struggling with scarce medical supplies and conducting surgeries on hospital floors without anesthesia to save victims of a massive blast that killed nearly 500 Palestinians. Both Hamas militants and the Israeli military dispute the facts surrounding the explosion. Protests across the Arab world have broken out as Israel gears up to deploy tens of thousands of troops in Gaza in preparation for a full-scale ground offensive. For more insight, VOA's Paul Ndiho spoke to Dr. Edgar Githua, an expert in international relations, security and diplomacy at the U.S. International University in Nairobi.