Brian Billick and Steve Mariucci break down the action from Week 1 in the NFL, including Colin Kaepernick's performance against the Green Bay Packers; the starting debuts of Geno Smith, EJ Manuel and Terrelle Pryor; and Reggie Bush's impact on the Detroit Lions' offense. Plus, just how worried should the Pittsburgh Steelers be coming off a bad loss to the Tennessee Titans? 

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