'Witnessing' my mother's handgun suicide, as a teen-ager, probably wasn't my only 'ACE', but if we use the World Health Organization's 'WHO ACE International Questionnaire'--which includes both their types of ACEs: "Adverse Community Environments" as well as "Adverse Childhood Experiences", it may be comparable to an Epidemiologist's 'Grand Rounds' issue presented at [then Dartmouth, now] Geisel Medical School 'Grand Rounds' in 2000: "52% of Detroit Metropolitan Area Schoolchildren met the DSM-IV criteria for PTSD". I had occasions to observe much, including 'schoolchildren', in the Southeast Bronx-in 1972-73 ....