How national tragedy may impact our heart health

In a short time span we've seen news headlines filled with terrible... tragic events.
From the recent terror attacks in Nice, France to recent police officer shootings in Dallas, TX and Baton Rouge, LA and shootings across the U.S.
And for many it can be overwhelming... but can it affect our health?
Cardiologist, Dr. Joel Kahn discusses how negative events can affect our heart.