The more I think about it, whatever agency (NSA or CIA, or whatever. The government) John was working for must have been interested in the Ray Sphere. They probably didn't stop the development because they wanted it, and/or wanted to see what will happen anyway (instead of carrying out the experiment on their own).
If there's a sequel, I'm sure more will be revealed, such as why the government ignored and left John for dry. Perhaps Maya isn't predictably a double agent for Kessler, but indeed is working for the government.









