Screenings for colon cancer, the second leading cause of U.S. cancer deaths, should begin at age 45, not 50, according to a task force. ABC News Live Prime, Weekdays at 7EST & 9EST WATCH the ABC News Live Stream Here: • LIVE: Latest News Headlines and Events l A... SUBSCRIBE to ABC NEWS: https://bit.ly/2vZb6yP Watch More on http://abcnews.go.com/ LIKE ABC News on FACEBOOK / abcnews FOLLOW ABC News on TWITTER: / abc #ABCNLPrime #ByTheNumbers #ColonCancer #CancerDeaths