Grammy Lifetime Achievement folkie Tom Paxton stops by The Barns to offering topical social commentary on everything from Fannie Mae's downfall to Sarah Palin's politics to Pluto's downsized status. Thursday, March 10, at 8 p.m. The Barns at Wolf Trap, 1645 Trap Road, Vienna. Tickets are $22. Call 703-255-1900 or visit wolf-trap.org.