Jens Stoltenberg on NATO unity, support for Ukraine

This week the Biden administration authorized another $700 million in military aid for Ukraine as its war to fend off Russia's invasion grinds into its fourth month. The U.S. has helped bring together NATO in ways not seen in recent years to support Ukraine militarily, but some cracks are starting to show. NATO Secretary-General Jens Stoltenberg joins Nick Schifrin to discuss.