Michael Levi, senior fellow at Council on Foreign Relations, examines how the arrival of cold winter weather changes the standoff over gas supplies from Russia into Ukraine. He speaks on "Bloomberg Surveillance."
Ukraine's Energy Challenge
Bloomberg: Ukraine, Russia gas fight chilled by winter freeze (VIDEO)
Employees working near an underground gas storage in the village of Opari, some 70 kms south-west from Lviv on Sept. 30, 2014.
