If the dragon attacked the US, it would be caught on video immediately. The video would become an instant hit on YouTube and the dragon would be offered a job in the next hobbit movie. The dragon gets more fame and becomes an A list celebrity. He then is elected as the governor of California. Through a series of bribes and threats, the dragon is able to run for president, even though he isn't a citizen. All the liberals and minorities vote for him just because we never had a dragon as a president. We would then be taken over by China because the dragon was born there.
The end