While out for a run, he was hit by a car and sustained a traumatic brain injury. Doctors told his parents he would be a vegetable if he survived, but Burnham didn't give up.
Earlier this month, after rehab at TIRR Memorial Hermann and hard work, he was able to get his diploma with the rest of his high school classmates.
"I want them to know that because I had a brain injury, I'm still the same Luke," he said. "No different."