March 27, 2015: At Brooke Army Medical Center in Texas, physical therapists often see patients who have suffered a mild traumatic brain injury, or concussion, in the line of duty.  Sometimes the concussion is the result of an explosion in combat. Other times, it might be due to a fall or collision during training.

Lietenant Colonel Tony Cromer Jr, suffered a concussion due to a more common workplace hazard, when his head was slammed by an opening door. The effects of that workplace accide