NEW YORK - The world knows a lot more about Bar Refaeli today than it did yesterday, including where her tiny tan line falls. Sports Illustrated Swimsuit unveiled the 23-year-old Israeli, who has been romantically linked to Leonardo DiCaprio, as a first-time cover girl on Tuesday. This gig, more than top fashion or entertainment magazines, can be career-altering as it puts a model's face (not to mention, her fantastically toned body) in front of millions of eyeballs, appealing to both men and women, sports fans and fashionistas. It's the cover that matters most, says SI group editor Terry McDonell, but...