Arlington began three centuries ago as the farm section of Alexandria County and emerged in the 1900s as a vibrant suburb of the nation's capital. Global notice came after the creation and expansion of Arlington National Cemetery, the Pentagon and Fort Myer, site of history's first airplane casualty--September 17, 1908. Add in some modern marquee employers--PBS, WETA, Nestlé, the Foreign Service Institute and Amazon--and it's a recipe for accelerating...