The clean-cut young Frenchman seemed to have everything going for him. A graduate of an elite French engineering school, he had interned at the upper-crust Rothschild bank in Paris, handled wealth management for a while on Wall Street and was accepted for a prestigious master's degree program at the University of California at Berkeley.

Except for one thing: His name was Mohamed Youcef Mami.

The State Department held up his student visa for more than two months for "administrative processing," which according to diplomats is the euphemism-of-art for a check against multiple watch lists maintained by intelligence agencies in Washington designed to prevent suspected terrorists from entering the United States.