Mike Beck, a National Security Agency counterintelligence officer, could always bang out 60 words a minute. But in early 2006, Beck struggled to move his fingers at their usual typing speed. Soon after, a brain scan showed why: Beck had Parkinson's disease, the second-most-common neurodegenerative disorder in the United States. He was only 46 - unusually young for Parkinson's. No one in his family had ever had it. Then, in an unsettling coincidence, he learned that an NSA colleague - a man he'd spent a pivotal week in 1996 with in a hostile country - had also just been diagnosed with Parkinson's. Eventually, Beck read a classified intelligence report that convinced him that he and his co-worker on the trip were likely the victims of a covert attack that led to their illnesses - and that has prompted a highly unusual workers' compensation claim. Beck believes that while he and his colleague were sleeping in their hotel rooms, the hostile country, which he cannot name for security reasons, deployed a high-powered microwave weapon against them, damaging their nervous systems. For the last four years, Beck, 57, has been trying to persuade the Labor Department to award him 75 percent of his salary, or about $110,000 a year. But the Labor Department won't approve Beck's request without solid evidence that he was targeted. In Beck's case - short of obtaining proof from the hostile nation's spy service - he'd need the endorsement of the NSA, which has refused to provide it.