Before revision: Corporations active in this research such as The MITRE Corporation, AIRBUS BAE Systems, Northrop Grumman, Boeing, Raytheon, Thales Group, CAE, Saber Astronautics and Lockheed Martin.
After revision: ,Corporations active in this research such as The MITRE Corporation, AIRBUS BAE Systems, Northrop Grumman, Boeing, Raytheon, Thales Group, CAE, Saber Astronautics and Lockheed Martin.