He’s barely 18, but Corbin Gulde has already faced incredible challenges, beating cancer four times and just recently graduating high school. Corbin’s fight for his life started when he was just 3 years old. The family brought Corbin to St. Jude Children’s Research Hospital in Tennessee for treatment. When he was sent home a year later, they hoped it would be the last they heard of cancer. InsideEdition.com’s Mara Montalbano has more.