molly henneberg is live in washington. specifically, molly, what kind of things have security experts concerned? >> reporter: jon, everything from the hacktivists making the lights go out at an event or them taking down the visa atm machines around olympic sites or those activists with a political bent trying to get a point across. here is what former hacker said about that risk. >> the target i think would be probably the olympic scoreboards. could you imagine the play the hacktivists could get if they somehow break into systems that control the scoreboards and post their own messages? that would i think definitely be a likely target. >> reporter: atos is the french company in charge of 11,000 computers and servers at the game and the company has done over 200,000 hours of testing of the system including testing its response to simulated cyber attacks. more than 3500 engineers and computer experts are monitoring the cyber networks at the olympic games.