Codename

"You already know about this?" Nicholas was a bit surprised. He then looked at his sister and guessed how they might have gotten the information.

"Actually, the information we have is incomplete. On the day the zombie virus outbreak occurred, a satellite detected a sudden mist appearing in the eastern seas of Country A. Any electronic devices were unable to detect what was happening inside the mist!" Nicholas pondered for a moment and finally decided to tell the truth.

The technology to remove wireless interference was too important for them, and while the truth about the virus outbreak was known only to a few, it wasn't exactly a secret that couldn't be shared.