Seventy years after Holocaust, nightmares return to the US

Many years ago I left for Europe to become a pilot, but ended up at a university doing biomedical research. During those “bio-engineering years”, I was confronted with the aftermath of the Holocaust. My head of department was the leading professor in the treatment of Holocaust victims suffering from so-called concentration-camp (KZ) syndrome. 
Most survivors were able to suppress the horrible memories by living a structured work life. After their retirement, however, nightmares would often start to make their life hell. 
The treatment consisted of long therapeutic sessions, making use of LSD and psychoanalysis, in which the patient was “guided” back to the Holocaust epoch, responsible for the nightmares, and relived them once again, while an audio record was made. The patient would receive an audio copy and be told to listen to it in the clinic and, after some time, at home. In many cases this had a positive effect: after a while, the nightmares would stop or become less frequent. The patients worshipped the Professor, but his “applied” method was heavily criticised by fellow colleagues. I witnessed some sessions from behind a one-way screen and realised that many facts of the Holocaust had never reached the public. 
Mr Bahrt’s boyhood recollection of his father’s words brought to mind something I read many years after I left the university: the children and even the grandchildren of Holocaust victims seem to be experiencing a recurrence of those old nightmares. 
Dirk Sumter