from then candidate donald trump. and the white house, i suppose, is thinking that over the next six months that some of these questions will be answered by these various national security agencies that have some kind of say in all of this. but this is becoming, anderson, a promise made by the president -- if all of those files are not released by the end of april 2018, the president will have a promise he didn't keep with the american people. >> jim acosta, appreciate it. thanks very much. joining us with his take is cnn presidential historian, tim naftali. tim, i know you're interested to see these documents. what stands out to you, and what more do you think there is? how much do you think the veil will be lifted? >> well, i'm waiting to see if national security agency materials are open. the review board, in its final report, said they looked at national code breaking materials, decided they were not relevant to the lee harvey oswald issue, but they were