The simulation featured a video message from the bad guys , who called themselves `` Flag Day Associates , '' also posted on YouTube . 100 ` ` ethical professionals '' register to participate in the Security Challenge ' . All of them will be selected to compete in simulated environments . Only one of them will win and be chosen for a master class .
100 ` ` ethical professionals '' register to participate in the Security Challenge ' . All of them will be selected to compete in simulated environments . Only one of them will win and be chosen for a master class .