CBS News has learned that Iran is continuing to make progress on its expanded efforts to enrich uranium — in spite of covert efforts by U.S. and other allied intelligence agencies to actively sabotage the country's nuclear program. "Industrial sabotage is a way to stop the program, without military action, without fingerprints on the operation, and really, it is ideal, if it works," says Mark Fitzpatrick, the former Deputy Assistant Secretary of State for Non-Proliferation and now Senior Fellow in Non-Proliferation at the International Institute for Strategic Studies. Sources in several countries involved told CBS News that the intelligence operatives...