A little bit more info from the Village Voice.
http://blogs.villagevoice.com/music/..._youth_and.php
Via Sonic Youth's Twitter comes this wonderful bit of news: The iconic New York rockers will storm the beaches of the Williamsburg Waterfront on August 12. Joining them will be the supergroup Wild Flag, made up of Sleater-Kinney members Carrie Brownstein and Janet Weiss, as well as Mary Timony (Helium) and Rebecca Close (the Minders). Tickets for the gig go on sale April 29 at noon (SY's official site has more information), and will surely sell out quickly.