CTE, or chronic traumatic encephalopathy, is in the news after sources say the Midtown Manhattan gunman cited the brain disease in a suicide note. CNN's Dr. Sanjay Gupta addresses some of the questions you may have. | CNN International

In the 17 years since the first American football player was diagnosed with CTE, researchers at the Boston University CTE Center have made massive strides in understanding the disease and are progressing toward a diagnosis in living people. To provide a “State of the Science” on football and CTE, Dr. Michael Alosco of the BU CTE Center joined us for a special #CTEAwarenessMonth webinar. Joining Dr. Alosco were four members of our Legacy Family Community - Becky Fase and Barbara Pinder, whose hus