leading us off from washington. >> reporter: tonight, more confusion and drama surrounding the assassination of jfk. president trump announcing some of the secret documents scheduled to be released today will not be, because they pose a danger to national security. 2,800 other documents are being released to shed more light into the killing. >> and mrs. kennedy. >> reporter: on november 22nd, 1963, president kennedy and the first lady arriving in dallas, on that day that would change america. that tragic trip through dealey plaza, the first couple riding through that windy road in dallas in a lincoln continental with the top down. the president an open target for assassin lee harvey oswald. >> president kennedy has been shot in dallas, texas. >> reporter: from the get-go, the news was so hard to believe. a single man with a rifle killing the protected leader of the free world. then, just two days later, on live television -- >> there is lee oswald -- [ gunshot ]