Actress Audrey Hepburn has given emotional testimony on the hunger, starvation and death she witnessed during a mercy mission to Sudan. Describing new arrivals at a refugee camp near the center of the war-torn country, the goodwill ambassador of the United Nations Children's Fund said Sunday: "They have nothing left - not even their bodies. They are so emaciated. It seems that all they have left are their souls." Hepburn spoke at a news conference in Nairobi, Kenya, the first of many she will conduct to publicize a massive U.N. Relief effort for the southern Sudan. That effort has been plagued by delays caused by political problems, weather and lack of equipment. U.N. officials have all but conceded they will not meet their initial deadlines.