JUDY WOODRUFF:

Now we continue our series Inside Putin's Russia.

There may be no more consequential relationship for the United States than with Russia. Both nations possess world-ending capacity, and may be at the most critical moment since the end of the Cold War.

Tonight, we explore the bilateral relationship, the tension and how Russians see the United States.

Again in partnership with the Pulitzer Center on Crisis Reporting, special correspondent Nick Schifrin and producer Zach Fannin start their report in Moscow on Victory Day.