when you say "The problem is that the Nuclear Non-Proliferation Treaty (NPT), in which all these countries are members, allows many of the steps necessary for the development of nuclear weapons to occur under the guise of civilian nuclear programs. For example, under the NPT's rules, uranium enrichment is possible, which is a critical component of making nuclear arms," you seem to be assuming that you know something that the people who wrote NPT didn't know - but you haven't told us what. It is fair to assume that they had some idea of what enriched uranium and its uses were, don't you think?
Israeli vehicle hit in drive-by shooting in West Bank; no casualties reported (Haaretz)
from the article: Danger for the entire world