Top Priority Sector:  perimeter_protection Image Caption:  Mobile barrier fromNasatka Security Nasatka Security’s president, David Natelson, on Sept. 25 announced that a $20 million order the company landed in December 2011 from Torrance, CA-based Rapiscan Systems Inc. is now complete.  As a subcontractor to Rapiscan, Nasatka Security will provided more than 130 mobile barriers,…