It might surprise you to learn that many of the innovations deployed to counter the coronavirus were once obscure Pentagon-funded projects to defend soldiers from contagious diseases and biological weapons. The life-saving vaccine developed in record time owes a debt to these programs. To learn more, we met the man who has been leading the rapid vaccine effort, retired Colonel Matt Hepburn. An army infectious disease physician, he spent years with the secretive defense advanced research projects agency or DARPA, working on technology he hopes will ensure COVID-19 is the last pandemic.