CNBC's Wapner accepts ice bucket challenge

12:57 PM ET Tue, 12 Aug 2014

CNBC's Scott Wapner accepts the "ice bucket challenge" from Biogen Idec's Doug Williams on "Fast Money Halftime Report." He then passes it to Facebook CEO Mark Zuckerberg and Twitter CEO Dick Costolo. Trader Pete Najarian shares the story of his brother Paul who passed from ALS.