The soaring, majestic Drill Hall in New York’s historic Park Avenue Armory provided an awe-inspiring setting for the National’s taping for Live from the Artists Den. The massive space, designed to resemble a classic European train station, hosted 900 invited guests, who witnessed the debut of numerous songs from the Brooklyn-based band’s album, Trouble Will Find Me, along with blistering versions of such favorites as “Fake Empire,” “Bloodbuzz Ohio,” and “Terrible Love.”