our guest is reuters david shepardson. be right back. >> this week on the communicators, christina chaplin, whose government accountable the office report says that the pentagon system's cyber security is vulnerable. >> right now they don't even test systems for the kinds of threats you might see from russia and china and north korea. they're not allowed to in terms of testing. they don't want to potentially disrupt the system. >> watch the communicators tonight at 8:00 p.m. eastern on c-span2. , where history unfolds daily. in 1979, c-span was created as a public service by america's cable television companies. and today we continue to bring you unfiltered coverage of congress, the white house, the supreme court and public policy events in washington, d.c. at around the country. -- and around the country. c-span is brought to you by your cable or satellite provider. >> when the new congress takes office in january it will have the youngest most diverse freshman class in recent history. new congress, new leaders. watch it