When I first started practicing immigration law, I would advise clients who were not U.S. citizens or permanent residents not to fly into the United States at Detroit. The officers, I was told, were treating people unfairly though I had no first-hand knowledge of problems there. Then, one day, I got a call from a gentleman who had come to see me about an investor visa, an E-2, to invest in an enterprise in La Jolla, California. He told me…