BitFluid writes "According to CNN.com, hurricane Dennis is casting doubt on the shuttle's July 13th launch date. From the article: 'NASA has until the end of July to send Discovery on a flight to the international space station, otherwise it must wait until September to ensure a daylight launch.' Shuttle managers decided Thursday evening to begin initial preparations to move Discovery from the pad, as the hurricane increased in intensity and headed toward the Gulf of Mexico and Florida's southern tip. NASA spokesman George Diller said, 'We're going to keep our options open. We're still trying to protect the 13th.'"