NFL Commissioner Roger Goodell takes questions during an NFL football news conference in New York, Monday. The NFL is partnering with private companies as well as the U.S. Military to further research on head injuries.
Comments are filtered for language and registration is required. The Times makes no guarantee of comments' factual accuracy. Readers may report inappropriate comments by clicking the Report Abuse link next to a comment. Here are the full legal terms you agree to by using this comment form.