WALLER COUNTY, Texas -- Houston police started testing unmanned aircraft and the event was shrouded in secrecy, but it was captured on tape by Local 2 Investigates. Neighbors in rural Waller County said they thought a top-secret military venture was under way among the farmland and ranches, some 70 miles northwest of Houston. KPRC Local 2 Investigates had four hidden cameras aimed at a row of mysterious black trucks. Satellite dishes and a swirling radar added to the neighbors' suspense. Then, cameras were rolling as an unmanned aircraft was launched into the sky and operated by remote control.