HUNGRY ALL THE TIME: Imagine being hungry all the time. Leona Roberts, 15, suffers from a genetic condition called Prader Willi Syndrome that drives her to overeat. She is under constant supervision to keep her from eating herself to death. She does her best to balance her disability with the needs of a normal teenage girl. Seen here, Leona stretches after washing dishes at her house in North East, Md. The refrigerator is padlocked shut to prevent her from sneaking food.