Two weeks after the ceasefire between Hamas and Israel took effect, aid is flooding into the Gaza Strip. The supplies offer relief to a territory suffering from hunger, mass displacement and devastation following 15 months of war. But Palestinians and aid workers say it’s still an uphill battle to ensure the assistance reaches everyone. And looming large is the possibility that fighting will resume if the ceasefire breaks down after the six-week first phase. Humanitarian groups say aid distribution is complicated by destroyed or damaged roads, Israeli inspections and the threat of unexploded bombs.