Make-a-Wish - Bill Whitaker reports on the people behind "Make-A-Wish," the popular organization that grants the wishes of seriously ill children in towns across America. Wishes come true because of volunteers and miracle workers.The Health Wagon - Scott Pelley reports on nurse practitioners who are providing badly needed healthcare to the uninsured working poor in Appalachia.The Giving Pledge - A group of billionaires pledges to give at least half their vast fortunes to charity, in hopes of changing the world. Charlie Rose talks to some of them, including founding members Warren Buffett and Bill and Melinda Gates.