(Photo by Petr Metlicka) The popular “Urban Nutcracker,” a modern take on the classic ballet produced by JP’s BalletRox, got national attention on the ABC News program “Nightline” on Dec. 23. The piece about various versions of the ballet included footage of this year’s “Urban Nutcracker” at Wheelock College and BalletRox’s Amory Street studio. Above, Caroline Cohn and Joe Gonzalez dance in this year’s show.