United Hatzalah says it was pressed to leave due to 'concrete threat' stemming from neighboring Syria and growing civil unrest; delegation uses billionaire Miriam Adelson's plane

Relatives of people trapped under the rubble dig for their loved ones, with help from local police, as they wait for rescue team to arrive at collapsed building in Gaziantep

Teams continue to search through unstable structures, with temperatures below freezing; survivors seek shelter wherever they can; health facilities in northern Syria overwhelmed