ballot-counting process. i have a lot of confidence in the security and cyber security around the process run by state and local election officials. >> reporter: here at the department of homeland security's cyber command center, they're now monitoring multiple threats. there's growing concern that more hacked documents and e-mails targeting campaigns could be released in the coming days, including potentially documents faked or altered by russia. the u.s. has also detected the probing of state voter registration systems, at least one of which has been linked to russia, though they have yet to see those systems tampered with. dhs is coordinating efforts with 48 states to prevent hacks, scamming computer systems to identify vulnerabilities. however, u.s. officials and cyber experts make clear that the risk of actually changing the election result is minuscule. >> these machines are most low offline. there's paper ballots that can be checked and verified that the