After the China incident, Chris managed to find Piers's body. Although mutated, he was still alive.
He took him back to the headquarters and, with the help of a close friend, they were able to reverse the mutation.
The BSAA, with Chris still on charge, finished "cleaning" Edonia and went back to the US.
The bioterrorism in the rest of the world seemed that, finally, started to fade.
Back in America, Chris created a new division of the BSAA based on New York. He gathered the best agents in the country to join him.