Will Rogers was known for his laughter, but he also knew how to weep. One day he was entertaining at the Milton H. Berry Institute in Los Angeles, a hospital that specialized in rehabilitating polio victims and people with broken backs and other extreme physical handicaps. Of course, Rogers had everybody laughing, even patients in really bad condition; but then he suddenly left the platform and went to the rest room. Milton Berry followed him to give him a towel; and when he opened the door, he saw Will Roger…