Shark Attack Surge in North Carolina: What Could Be Behind It

As beach season hits high gear this holiday weekend, some people in North Carolina - - are calling for beach closures amid a surge in shark attacks over the past month.There have been 11 shark attacks off the shores of the Carolinas this year, most in just the last three weeks. href='http://abcnews.go.com/US/shark-attack-surge-north-carolina/story?id=32202330' - http://abcnews.go.com/US/shark-attack-surge-north-carolina/story?id=32202330 -