Ricardo VergaraBay Ledger News Zonebill@blnz.comtag:www.blnz.com,2009:people/ricardo_vergaraWashington DC booms but unease at racial dividetag:www.blnz.com,2009:2012/05/08/Washington_booms_unease_racial_divide_32d0It was once known as the "Murder Capital of the World," a city beset by a crack epidemic, no-go areas and resulting crime which triggered decades of white flight to the suburbs.2012-05-08T07:16:33ZAFP Global Editionby Arthur MacMillan