Project RMDW stands for: Renkai Mass Destruction Weapons, and, while it won't be like a nuke, the subjects of the project are rather powerful and they are able to decimate entire armies by themselves (Level 5 esper power level). This project is entirely legal, but it is not public, high ranks are the only ones that know about it. Basically, it is special training for the talented to enter the military after they come of age. Even for those in it, there are still lots of secrets to be unveiled.