Geiser has denied harming any prisoners , though he said he had orders to shoot prisoners who tried to escape . He was granted a United States visa in 1956 and became a citizen in 1962 . He did not cite his Nazi ties on his U.S. visa application , but has said he was never asked about them . Geiser is not accused of lying about his Nazi ties .
According to the above context, answer the following question.
What type of lesson is is the post ?


History