'More emotion' says Vikings coach Mike Zimmer

Vikings head coach Mike Zimmer is asking for more emotion out his players this season, even in practice. 

Of particular importance to coach Zimmer, he says, is getting quarterback Sam Bradford to play every down with more heart.

"Sam is a pretty flat-line guy," he said. "Part of that is being the leader of this football team, so I've been talking to him a little bit about taking charge."