These individuals, and others like them, worked on classified military research. None favors nuclear proliferation, but each has the potential to make substantive scientific and engineering contributions to weapons programs in what have come to be known as the "rogue nations" of the world--Iraq, for example.
But they also have the potential to contribute to the United States gross national product. Fortunately, they are in the U.S. at the moment, seeking productive employment in the research and development, science, engineering, and technology communities. They are ambitious, energetic, and willing to accept entry-level positions to obtain U.S. experience, to build their professional contacts and reputations, and to start new lives.
They came here recently as refugees, immigrants, or those in search of political asylum. And they serve as examples of new talent available to the U.S. that can deter or prevent--at modest cost to American citizens--weapons proliferation, including nuclear weapons.