noble man. the best father a son or daughter could have. and in our grief, let us smile knowing that dad is hugging robin and holding mom's hand again. >> former president george w. bush tearfully remembering his father as hundreds filled the national cathedral here in washington to say a final goodbye to a giant of politics. and amid the reverence, the honor and tradition, there was also this moment. an extraordinary image of president trump greeting former president obama. the first time the two men have spoken since president trump's inauguration. and a tense brief handshake you saw between trump and michelle obama right there. hillary clinton and donald trump, two bitter rivals, did not make eye contact. joining me, douglas brinkly and author and contributor kate anderson braugher who interviewed george h.w. bush.