Theres a ceasefire between israel and the gaza strip. More than 172 people are dead following several days of back and forth rocket fire. Thousands of palestinians are leaving their homes and seeking safety in u. N. Shelters. U. N. Secretary ban kimoon says its in the interest of both sides to stop the fighting and prevent further casualties. Nbcs Ayman Mohyeldin has the latest. Reporter from the skies above and the sea, israel is stepping up its campaign to destroy rocket sites in gaza. Morning warning residents by phone and leaflets leave your homes or risk injury. In the middle of the night, thousands of palestinian families began leaving with little they have. Some of the children barely had time to put on their shoes before escaping. Thousands the u. N. Said have already taking refuge at schools now used as makeshift shelters. While some families fled the fighting, others mourn hose lost in it. Overcome with grief, she lost three of her children fainted. Mourners pray for the dead