http://www.bloomberg.com/features/20...-surveillance/

Read the whole story at the link

Internally, however, Walmart considered the group enough of a threat that it hired an intelligence-gathering service from Lockheed Martin, contacted the FBI, staffed up its labor hotline, ranked stores by labor activity, and kept eyes on employees (and activists) prominent in the group. During that time, about 100 workers were actively involved in recruiting for OUR Walmart, but employees (or associates, as they’re called at Walmart) across the company were watched; the briefest conversations were reported to the “home office,” as Walmart calls its headquarters in Bentonville, Ark.