Nasa has announced that it's Mars Reconnaissance Orbiter will attempt to launch on Wednesday, August 10 at 7:54 a.m. EDT. Launch will take place from Cape Canaveral Air Force Station aboard a Lockheed Martin Atlas V-401 rocket. The launch window extends until 9:39 a.m. In the event that the launch is delayed, they will try again at 7:50 a.m. on August 11.