joined by joe mann of reuters and hannah kuchler of the financial times. lots to talk about including course air is rah. that is the beginning and that is the traditional four-year college with a campus. what is the state of colleges these days? >> well, you know, i think it's good. the top colleges in the united states are still the best in the world and still attract the best students. and that four-year experience is still an extraordinary valuable experience. some of the concern about the worries of colleges are overblown. the biggest single problem has been underfunding by state governments of the state institutions, which are where the real cost of attendance has gone up dram emptyically. less so for private colleges in the united states. actually, the net cost, after financial aid, less than -- less than 1% a year over the last 15 years. >> so, what do you say when people say it's just too expensive, it's not worth it anymore? >> billion, i think the data show the opposite is true. it is worth it. the lifetime earnings expectations are clearly are s

our reporters, joe mann of reuters and hannah kutcler of london

questions and break down this whole controversy, our jonathan mann spoke earlier with two cnn experts. >> let's bring in cnn correspondent joeohns and paul kallen in new york. i want to ask you the most basic question of the server, joe johns. what is a private server, why did she have it and does everyone in washington have a private server? >> no. a private server is a computerized device that handles e-mail and it's certainly a little bit unusual for a government official to have one. and even more unusual for a government official to actually use that private e-mail server exclusively for their own e-mail. and that's what she did again and again over a long period of time. she says she did it out of convenience. one of the reasons why is she wanted to be able to use just one e-mail for both her business communications as well as her personal communications, and that is what has caused the controversy. >> was there anything illegal about it then? and were it to be illegal now? >> it would be illegal now. regulations changed in 2014 that would prohibit the use of a server. this server, if there's a file room in your office