(Bloomberg) -- Insiders liken it to a “panic button.” And for more than 80 years, the primary job of the National Defense Stockpile has been to keep the US military supplied with essential raw materials and protect against supply shocks.Most Read from BloombergLargest Covid Vaccine Study Yet Finds Links to Health ConditionsCapital One to Buy Discover Financial in $35 Billion Stock DealWall Street’s Moelis Bet Big on the Middle East. Now He’s Cashing InStocks Pause Near Record as Traders Await Ca