 Biden is welcoming NATO leaders later today with remarks at the Mellon Auditorium in Washington, D.C. It's the site of where the treaty that first created the transatlantic alliance was signed 75 years ago. The Biden administration has taken pride in strengthening and expanding NATO in the face of Russia's war in Ukraine, and Biden will be meeting with Ukraine's President Zelenskyy this week. But looming over this NATO summit are questions about the future of this