The national debate on gun control has sparked an increased focus on mental illness. “A majority of gun crimes are committed by people who do not have mental health issues,” said Mark Salzer, chair of rehabilitation sciences at Temple. Salzer says roughly 15 to 20 million Americans have serious mental health issues and while he’s happy the gun control could mean more funding for mental health, he warns that it could also result in more discrimination. “Gun violence is actually not a mental health issue, it’s a gun issue,” he said.