Hiding Details of Dubious Deal, U.S. Invokes National Security WASHINGTON � For eight years, government officials turned to Dennis Montgomery, a California computer programmer, for eye-popping technology that he said could catch terrorists. Now, federal officials want nothing to do with him and are going to extraordinary lengths to ensure that his dealings with Washington stay secret. The Justice
![Hiding Details of Dubious Deal, U.S. Invokes National Security (Published 2011)](https://cdn-ak-scissors.b.st-hatena.com/image/square/fe030e8de44e4b8c244bcc65dcaec36d6762b3ba/height=288;version=1;width=512/https%3A%2F%2Fstatic01.nyt.com%2Fnewsgraphics%2Fimages%2Ficons%2FdefaultPromoCrop.png%3Fyear%3D2011)