A Falcon 9 rocket is vertical on the pad at Kennedy Space Center's Launch Complex 39A with a classified payload in the fairing. A launch window for the flight opens at 8:00 p.m. EST and remains open until 10:00 p.m. The first stage of the Falcon 9 will return for a vertical landing at Landing Zone 1 at Cape Canaveral Air Force Station. Defense giant Northrop Grumman has confirmed in a statement that it procured the launch for an undisclosed customer, but what the payload is, and who will be operating the satellite, have not been revealed. The codename for...