如何灭绝美国人？

I live in Washington DC the capital of the United States. I often meet and communicate with American politicians. Therefore we will discuss a desperate topic: Is the extinction of Americans theoretically feasible? The answer is yes. So I wrote this book and answered the feasible plan to exterminate Americans.我生活在美国的首都， 华盛顿市。我时常与美国政客见面和交流。因此， 我们会讨论到一个令人绝望的话题:灭绝美国人， 在理论上可行吗？ 答案是， 可行的。于是， 我写了这本书， 解答了灭绝美国人的可行性方案。