Palestinian doctor and five-time Nobel Peace Prize nominee, Izzeldin Abuelaish, has experienced immense personal tragedy. In January 2009, an Israeli tank shell hit his home killing his three daughters and one of his nieces and in October this year, 22 members of his extended family were killed in Jabaliya refugee camp by an Israeli airstrike. Dr Abuelaish speaks to the Guardian about how his personal loss has made him determined to push for peace.