>> and the trade winds soft through the sighing trees. >> and the fat worms waiting on the dawn bright lawn and he names the sky his own. >> but a caged bird stands on the grave of dreams, and the shadow shouts on a nightmare scream. >> his wings are clipped and his feet are tied. so he opened his throat to sing. >> the caged bird sings with a fearful trill of things unknown but longed for still. >> and his tune is heard on the distant hill for the caged bird sings of freedom. >> o'donnell: the words of maya angelou. that's the cbs evening news. for scott pelley, i'm norah o'donnell, and i'll see you tomorrow on "cbs this morning." good n