CBC television and Hockey Night in Canada had a relationship that lasted more than six decades - a unifying force for Canadian identity. That changed in 2013 when the league chose Rogers as its exclusive national broadcaster. David Shoalts takes readers into the backrooms, boardrooms, and the power lunches in his book, "Hockey Fight in Canada: The Big Media Faceoff over the NHL." He talks to Steve Paikin about how the CBC lost Hockey Night in Canada.