The Biggest Game: This Trade Built the Team of the 90's

Today on The Biggest Game, former Dallas Cowboys head coach Jimmy Johnson, the architect of the team of the 90's, explains how the most crucial building block in the Cowboys' dynasty wasn't named Troy Aikman, Emmitt Smith, or Michael Irvin. His name was Herschel Walker. Because trading Walker to the Minnesota Vikings on October 12, 1989 gave Dallas five players and three draft picks to jump start…