The U.S. Navy protects our seas around the clock. But what else does the Navy do? It innovates – a lot. Ray Mabus, who was Secretary of the Navy under both Obama Administrations and held that post longer than anyone since World War I, created a fully green fleet during his tenure. Now, 65 percent of energy on navy bases around the world comes from non-fossil fuels. This week, The Cipher Brief’s Kaitlin Lavinder spends 15 minutes with Secretary Mabus, who was previously the Governor of Mississippi and U.S. Ambassador to Saudi Arabia. Here, he tells Kaitlin about other innovations in the Navy, like unmanned underwater vehicles that compete with Russia and China on underwater capabilities.