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GEORGE DILLER: This is Atlas launch control, T minus 1 hour, 15 minutes, 15 seconds and counting, leading toward a launch this morning at 9 a.m. Eastern Time. We've heard that the liquid oxygen loading on the Centaur stage is complete and Atlas loading of liquid oxygen is now under way. We have about 15 percent onboard, so everything is going well and according to the timeline. Right now, here in the Atlas Space Operations Center, we have with us Howard Eisen, who is the flight system manager for the Mars Reconnaissance Orbiter from the Jet Propulsion Laboratory. Howard, welcome. HOWARD EISEN: Good morning. Thank you. DILLER: The MRO has, has been here at the Kennedy Space Center for about how long now? EISEN: We've been down for about three and a half months. We came down on April 29 from building up the spacecraft at Lockheed Martin in Denver. And we've been working here in the PHSF, the Payload Hazardous Servicing Facility, since that time. DILLER: And how many people have been working on it, as a rule of thumb? EISEN: There's a steady crew down here of about 50 to 55 people at any one time, but for particular operations we bring down whoever we need. So we might run through ano