. >> rose: we conclude this evening with a conversation with tom donilon, former national security adviser for president obama. >> the circumstances have changed quite a bit during the course of the second term. you have an unexpected fight in iraq and syria with respect to isis, which came on the scene as a major security challenge over the last year. you had renewed security challenges in europe with russia's incursion into ukraine. and you vof, as a result of all that, professors on the defense budget. and in my own judgment, instead of looking at the cut that are now contemplated i think we'll be looking at some increases in the budget. you have a changed landscape, no doubt about that. >> rose: the lessons of ferguson, missouri, and the analysis of tom donilon when we continue. >> rose: funding for "charlie rose" has been provided by the following: >> rose: additional funding provided by: >> and by bloomberg, a provider of multimedia news and information worldwide. captioning sponsored by rose communications from our studios in new york city, this is charlie rose. >> rose: we begin th

. ♪ >> tom donilon is here.served as the national security advisory until 2009. -- his consolidating gain even though the president has ramped up u.s. troops to 3000. the united states and iran failed to reach an agreement related extend talks through 2015. afghanistan is back in headlines as reports emerged that obama has approved an expanded u.s. mission to support aliban resurgence. -- to suppress taliban resurgence. i am pleased to have tom donilon back at this table. he knows about all of those things. we want to talk about it. let's talk about the resignation of chuck hagel. i interviewed him last week and then he resigned. >> was there a relationship between that? [applause] >> it has been suggested to me. he had it on his mind, the resignation. it happened between that interview and the moment he felt compelled to resign. help us understand it. >> it is difficult to do from the outside. secretary hagel have a long-term and close relationship from the senate. were close as senators. they traveled together

i am pleased to have tom donilon back at this table. he knows about all of those things.about it.a let's talk about the resignation of chuck hagel. i interviewed him last week and then he resigned. >> was there a relationship between that? [applause] me.t has been suggested to he had it on his mind, the resignation. it happened between that interview and the moment he felt compelled to resign. help us understand it. >> it is difficult to do from the outside. secretary hagel have a long-term and close relationship from the senate. favor were close as senators. they traveled together. impact onhagel had an senator obama's thinking. they became close friends and remain close friends. it is difficult to penetrate those conversations. they go both ways. is, oneis interesting argument put forward is the president wanted different kind of voice from his secretary of defense because events had changed. there was a different emphasis. does that had residents with you? >> it is difficult to penetrate. the circumstances have changed quite a bit during the course of the second term.