On Monday's broadcast of NewsNation's "The Hill," Dr. Tom Frieden, who served as CDC Director under President Barack Obama, argued that while no one can say for sure how COVID-19 originated, we do know for sure that lab leaks are a "major" risk and we "need to be regulating gain-of-function research more and reducing the number of laboratories that could -- on purpose or by mistake -- create a deadly organism that causes a lot of death and destruction."