Bobby Boswell and Steve Birnbaum are D.C United's Batman and Robin of defense

D.C. United center back pair Bobby Boswell and Steve Birnbaum interview each other at the MLSsoccer.com studios to get to know each other a little better.Heineken Rivalry Week: Watch D.C United take on rivals New York Red Bulls Sunday, August 30, at 7pm ET on Fox Sports 1.