Yemeni children receive aid food provided by the international community at a humanitarian center in Bani Heshish destrict in Sanaa, Yemen, on May 19, 2013. Half of Yemen\'s 24 million people are in need of assistance, as it is facing a worsening humanitarian situation during the political transitional period, Ismail Ould Cheikh Ahmed, the UN Resident and Humanitarian Coordinator for Yemen, said recently.