defense industrial base, and a lot of the places are compromised over ten years. china s military ambition has been off the charts in recent years, they launched a satellite killer missile into space, just over the past two years, deployed the first aircraft carrier and test flown the first stealth fighter jet. one expert told me technology for that was taken from the u.s. china s alleged hacking could be deadly for u.s. forces on the battlefield. i asked one expert about publicly released part of the latest report on the consequences of cyber snatching of weapons technology. if you mess with that software, the airplane won t fly, missile will miss the target, the ship may not get where it was intended to go. reporter: china s embassy hasn t responded to calls about the latest report. china repeatedly insisted it doesn t conduct cyber espionage on u.s. agencies or companies. how can the u.s. stop this?
it is intended to go. reporter: they haven t responded to calls and e-mails about the report, but the chinese government repeatedly insisted it doesn t conduct cyber espionage on u.s. agencies or companies. the chinese, though, apparently have done this for years. you have been speaking to and lists and experts. how can the u.s. stop it? experts say there s no way to completely stop them. what top defense contractors have to do, reduce the target area in cyberspace, a lot are good at doing that. if they sense a breach, pounce or it, limit the impact. the u.s. spends billions or trillions of dollars on these high tech weapons. absolutely. the chinese go ahead and come in, get the blueprints, study this, and spend a pittance in exchange. they get bits and pieces then can piece together what it looks like. the aircraft carrier, stealth jet, they have that technology, they re catching up because of