This was the United States in the mid 1940s, I doubt euthanasia (or even assisted suicide) was much of a thing back then. Plus, as someone else mentioned, there

This was the United States in the mid 1940s, I doubt euthanasia (or even assisted suicide) was much of a thing back then. Plus, as someone else mentioned, there was also the scientifical aspect of being able to study the effects of irradiation.