Only those who are ideologically opposed to military programs think of the defense budget as the first and best place to get resources for social welfare needs.
Every time a student walks past a really urgent, expressive piece of architecture that belongs to his college, it can help reassure him that he does have that mind, does have that soul.
Basically you come up with the fictional idea and you start writing that story, but then in order to write it and to make it seem real, you sometimes put your own memories in. Even if it's a character that's very different from you.