Raytheon announced Wednesday that it bought privately held cyber security company Blackbird Technologies for about $420 million. Raytheon, a defense contractor based in Massachusetts, said the acquisition will help expand its surveillance and cyber security services to clients. The president of Raytheon's intelligence information and services unit, Lynn Dugle, said in a statement, 'Blackbird expands Raytheon's already-established footprint in the intelligence community market while helping to grow our cyber operations and special missions support to the Department of Defense.' Blackbird, headquartered in Virginia, has contracts in defense, intelligence and law enforcement.