Billionaire Bill Ackman donates $400 million to brain research: shares heartbreaking story of daughter's coma, says he wants cure, not Nobel Prize winners

• The drive for this massive donation came from a tragic incident that shook Ackman.
• Sharing the heartbreaking story of their daughter's sudden brain hemorrhage, Bill Ackman revealed how he learned more about it and how he decided at that time only that he would make sure that the facilities are available