Hard Knocks, the weekly documentary show that follows an NFL team through training camp, will focus this year on the Dallas Cowboys, CBS 11 in Dallas is reporting. The show will apparently continue to be produced by NFL Films and shown on HBO. Hard Knocks began in 2001, focusing on the Baltimore Ravens training camp and then focused on the Cowboys the following year. In 2007 it followed the Kansas City Chiefs camp. Storylines the show is likely to focus on for this years version of the show include the hands-on approach of owner Jerry Jones, how rookie running back Felix Jones adjusts to his first camp, restricted free agent running back Marion Barbers contract negotiations and the relationship between wide receiver Terrell Owens and quarterback Tony Romo. The Cowboys training camp will open in late July in Oxnard, California.