on skeleton crews to police attacks in cyberspace. and successful attack now could do damage even after full staffs return to work. a cyber security expert who advices agencies across the government explained how. what may happen as a result of the shut down is that first incident which may have been detected previously with a full staff might be missed allowing a compromise to go deeper into an organization to get it more critical assets critical data. reporter: staff that monitor computer networks are still on the job, many staff who maintain them are not. being those networks are not being updated to resist new kinds of cyber attacks which can change by the second. the shutdown comes as cyber attacks are transforming from spying on computer networks to destroying them. the chairman of the house bell jens committee says it s a serious concern across the intelligence community. it s very concerning to me that we would allow any part of our national security structure, knowing wh