Almost three years of civil war in Yemen is forcing huge numbers of people from their homes. Activists say in the past few months alone, fighting in northwestern areas has displaced more than half a million people. And there are no signs of the war ending. Al Jazeera's Hashem Ahelbarra reports. Subscribe to our channel: http://aje.io/AJSubscribe Follow us on Twitter: / ajenglish Find us on Facebook: / aljazeera Check our website: http://www.aljazeera.com/