The ending of the recovery process at ground zero was marked by two memorial ceremonies held at the site for the relatives of the victims and the workers who have been sifting through the rubble ever since that terrible day. An empty stretcher draped with an American flag was first carried up a ramp to a waiting ambulance signifying those lost and never found. Following the stretcher, the final steel beam of the WTC that was taken down from the site was covered in black and driven through the crowds of mourners. The workers formed a sorrowful procession behind these two symbols of sadness and loss...