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>> at last check, they've tried a few different ways to troubleshoot it, to fix the problem. no word yet on whether they've been able to stop it at this point. this follows monday's scrubbed launch which was largely due to an engine cooling problem. it was a tricky sensor that was off. but engineers remain optimistic that today there will be a launch. for now, the weather has been cooperating so that helps. nasa meteorologists predict about 60% favorable conditions, which increases to 80% as the day goes on. of course this historic mission marks the next chapter of lunar exploration ...

Top speed of 250 knots, about 275 miles an hour. it has a fuel endurance, depending on the model, of between four and six hours. we also know from some of the initial reports around this, information coming from the governor of mississippi, also from local authorities, that the person who is piloting this plane, we don't know whether or not this person is a pilot, was an airport employee. so there are some big questions about how this person got into the airplane, started the airplane, and then took off. the reports say initially from the tupelo airport. and the initial reports also say that t...

Ground as well. so we'll see as this plays out, amara. >> we certainly hope the resolution is a peaceful one. pete, just for the sake of clarity, when we first got information about this, officials had told us that the pilot called 911 at about 5:00 a.m. local time. it sounds like you're getting updated information. just to have an idea of how much time, how much fuel may still be in the tank on this plane, the information you have is the latest, most updated one, and apparently it's only been in the air for about two hours? >> reporter: you know, i could be wrong on the times here, boris, i'm...