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Intro music.

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At NASA's Kennedy Space Center in Florida, Lili Villarreal spends her days packing Space Shuttle Discovery's suitcase for Return to Flight.

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The suitcase is a module called Raffaello, one of three Multi-Purpose Logistics Modules

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built by the Italian Space Agency to carry supplies to and from the International Space Station.

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"We fill up the cargo module with racks, and those racks hold either experiments, food supply, clothing for the astronauts...

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Anything that needs to go up to the Space Station, or anything that needs to come back from the Space Station, gets installed in the module."

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Preparing the module for Return to Flight was an intensive process.

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"The MPLM had to go through a lot of extra process that we didn't expect. We had to remove hatches and reinstall them,

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we had to do weld inspections to make sure the welds on the MPLM were okay to fly.

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Half of the racks we had to completely take apart, and modify them so that they're able to hold more weight, and are able to send up more supplies."

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With Return to Flight marching ever closer, the MPLM team is finishing up preparations for this high-profile, and high-stakes, mission.

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"We've started doing our stowage processing already. We've installed all the bags that go on the back side of the Resupply Stowage Platforms --

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that's a special rack that we have. And currently, right now, all the bags are actually empty,

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because there's a lot of weight flying for STS-114 on the way up, and on the way back we're going to have a completely full module."

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According to Lili, the most difficult part of her job is what makes the work so enjoyable.

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"During our test and assembly, we have a lot of issues that come up, and we have to deal with it,

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and sometimes we don't have a lot of time to figure out

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what the solution's going to be, so that's very challenging for this job, and that's what keeps this job very exciting."

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