CNN The 11th hour December 4, 2013 04:25:00
Dr. joseph maroon, because of the lure most players don't ask questions. should they? >> of course they should ask questions, and quite frankly they do ask questions. they're questions that have been asked over the last several years but perhaps not as many as should have been asked in the past. >> the lawsuit filed today against the kansas city chiefs covers years 1987 to 1993. cap you explain the cultural shift that you have seen in the nfl concerning concussions over your long career? >> sure. there has been a major cultural shift in 1970s, 80s, even early 90s, the main concern neurological...