When Katie Couric joined The Today Show in 1991, the oldest of America's morning news programs was floundering in the ratings, but her cheerful personality and unpretentious charm quickly made it the most popular morning show in America. Couric soon proved she was more than a mere television personality. Behind the contagious smile and down-to-earth-manner was an experienced journalist and producer. A former producer and political correspondent for CNN, she won an Emmy Award reporting for the...