In the Super Bowl this weekend, any player who takes a shot to the head and shows signs of a concussion will be taken out of the game. But it's a different story for high school athletes, who sometimes play on despite a head injury.
So the NFL, the American College of Sports Medicine and a long list of other groups are joining together to support state laws designed to protect the brains of young athletes.
It's well known that in March 1981, John Hinckley attempted to assassinate Ronald Reagan. What is not well known is that several years later, the life of President Reagan and the life of his vice president, George H.W. Bush, were threatened again -- in fact, not just once.