This is a picture of a head on head tackle. If the NFL can enforce more rules on head to head tackles then we can eliminate this type of tackle.
This picture represents all of the medical issues that happens to your head when some continues to get multiple head injuries.
This is a picture of Mike Webster. He is one of the many examples of NFL players that have died at a early age because of all of the head injuries and other health problems players suffer from the game of football.