26 people treated for ammonia exposure after commercial building gas leak in Virginia: Officials  ABC News26 people hospitalized after ammonia leak at commercial building in Northern Virginia  Yahoo! VoicesAmmonia leak sends 26 to the hospital in Sterling  WTOP26 People Sent to Hospitals After Ashburn Ammonia Leak  Loudoun NowUPDATED: 26 taken to the hospital after mass casualty incident at Sterling manufacturing plant  InsideNoVa