Just a week after President John Kennedy’s assassination, Lyndon Johnson addresses Americans on Thanksgiving Day, 1963:

“All of us have lived through 7 days that none of us will ever forget. We are not given the divine wisdom to answer why this has been, but we are given the human duty of determining what is to be, what is to be for America, for the world, for the cause we lead, for all the hopes that live in our hearts.  A great leader is dead; a great Nation must move on. Yesterday is not ours to recover, but tomorrow is ours to win or to lose. I am resolved that we shall win the tomorrows before us. So I ask you to join me in that resolve, determined that from this midnight of tragedy, we shall move toward a new American greatness.”