A German scientist works on a way of quelling overly aggressive soldiers by developing implants that directly stimulate the pleasure centers of the brain. A German scientist works on a way of quelling overly aggressive soldiers by developing implants that directly stimulate the pleasure centers of the brain. A German scientist works on a way of quelling overly aggressive soldiers by developing implants that directly stimulate the pleasure centers of the brain. A German scientist works on a way of quelling overly aggressive soldiers by developing implants that directly stimulate the pleasure centers of the brain.