 On April 18, mourners waited seven abreast in a mile-long line outside the White House for the public viewing of the slain president, reposing in his open walnut casket in the black-draped East Room.A cross of lilies was at the head and roses covered the coffin's lower half.Thousands of mourners arriving on special trains jammed Washington for the next day's funeral, sleeping on hotel floors and even resorting to blankets spread outdoors on the Capitol's lawn.