 FOR MORE ON THIS, I WANT TO BRING IN CBS NEWS INTELLIGENCE AND NATIONAL SECURITY REPORTER OLIVIA GAZA. OLIVIA, WHAT IS AT STAKE FOR BIDEN WITH THIS SUMMIT? TO AN EXTENT, LINDSAY, THE PRESIDENT HAS SET UP THE STAKES HIMSELF, SAYING IN A RECENT INTERVIEW THAT HE AND ONLY HE IS BEST POSITIONED TO BE A LEADER WITHIN THE NATO ALLIANCE, THAT HE WAS THE ONE WHO HELPED STRENGTHEN IT TO THIS POINT AND EXPAND IT TO THIS POINT AND IS BEST POSITIONED TO KEEP THAT GOING.