Nightmares, flashbacks and feeling shame about a traumatic event are just a few post-traumatic stress disorder, or PTSD, symptoms. Tragedies, such as the recent deadly shooting in Uvalde, TX can cause someone to suffer from PTSD. Just seeing these events in the media can even become a trigger for those who have experienced violence or abuse.  June is PTSD awareness month, a time to bring awareness to a condition that often causes people to suffer in silence. Psychologist Dr. David Nathan of Allina Health is here to help us understand more.