to disrupt north korean missiles with cyber attacks. president obama accelerated the program. >> if you track what's happened to the missile tests since then you discover an unusually high failure rate. for the most potent intermediate range missile, last year that failure rate was 88%. >> reporte >> it's not clear in if missiles were hacked. experts tresz hacks of missiles are almost impossible to detect and things like poor design or bad engineering could cause them to fail. >> any of the things that electronically happen, the ignition of the fuel, the staging of the missile, the cut off of fuel burn with liquid fuel missile, the guidance system, any of those things and