This compilation of ABC News segments reports on the complex, ongoing challenges facing families and organizations that shelter endangered children. The three segments are “Calling All Angels,” which explores dangers and frustrations familiar to many foster kids and visits a Kentucky institution for girls who have been in and out of foster homes; “A Call to Action,” which examines groundbreaking photography exhibits that have helped connect thousands of foster children with adoptive parents; and “Children on the Brink,” which follows a busy social worker as she visits homes affected by drugs and poverty—highlighting success stories as well as painful cases in which children must be removed. (54 minutes)