Jimmy finished school, went on a tour of the factory, and is preparing to relocate to Panama City, Florida, where there is a pressure chamber to simulate high altitude. He will visit New York City again to see Amy.
Jimmy is still in the US, although the return address he uses will be his oversees mailing address. When he does go overseas he will have more training before going into combat. This letter does not include a written date but it is most likely from either July 17 or 24.