'More air defense systems' -NATO chief on boost in arms for Ukraine

STORY: "President Putin has shown no sign of preparing for peace and therefore he must realize he cannot win on the battlefield," Stoltenberg added.

Defense leaders from around 50 countries and the North Atlantic Treaty Organization (NATO) will hold talks at Germany's Ramstein Air Base on Friday (January 20), the latest in a series of meetings since Russian forces swept into Ukraine nearly 11 months ago.

The focus in Ramstein is expected to be not on what the United States will provide but on whether Germany will lift its opposition to sending its Leopard battle tanks to Ukraine or at least approve their transfer from allied countries.