In this episode, Greg is joined by the amazing Andrew Gustafson from Turnstile Tours who unfurls the surprising history of the Navy Yard — through war and peace, through new technologies and aging infrastructure, through the lives of the men and women who built the yard’s reputation. And the story extends to the tiny neighborhood of Vinegar Hill, famed for its early 19th-century architecture and the mysterious mansion known as the Commandant’s House.