“Some people never learn,” he says. During the Vietnam War, Pyle blew the whistle on the Defense Department for monitoring and infiltrating anti-war and civil rights protests when he published an article in the Washington Monthly in January 1970.
The public was outraged and a lengthy congressional investigation followed that revealed that the military had conducted investigations on at least 100,000 American citizens. Pyle got more than 100 military agents to testify that they had been ordered to spy on U.S. citizens — many of them anti-war protestors and civil rights advocates. In the wake of the investigations, Pyle helped Congress write a law placing new limits on military spying inside the U.S.
But Pyle, now a professor at Mt. Holyoke College in Massachusetts, says some of the information in the database suggests the military may be dangerously close to repeating its past mistakes. “The documents tell me that military intelligence is back conducting investigations and maintaining records on civilian political activity. The military made promises that it would not do this again,” he says.

The very minute that the rules about domestic intel gathering and information sharing between the military and domestic law enforcement are loosened they seem to have gone right back to doing the kind of stuff that got these rules established in the first place.

Is the Pentagon spying on Americans? - Lisa Myers & the NBC Investigative Unit - MSNBC.com