Carter Sarkar has Sanfilippo syndrome, sometimes known as childhood Alzheimer's. His older sister Sophia is his biggest fan and is going to incredible lengths to keep him alive. At 6-years-old, he started showing signs of the progressive brain disorder that affects children. His family started a GoFundMe campaign called "Saving Carter" in an effort to raise $1 million to find a cure. InsideEdition.com's Keleigh Nealon (http://twitter.com/KeleighNealon) has more.