Nation Jan 20 Sports Illustrated Swimsuit issue turns 50 The first Sports Illustrated Swimsuit cover model: http://t.co/4ELT3gosSM pic.twitter.com/6yhY1uOkZX — ABC News (@ABC) January 20, 2014 The original Sports Illustrated Swimsuit cover girl Babette Beatty holds the Jan. 20, 1964, issue in which she…