NASA has asked that any future astronauts visiting the moon avoid disturbing any artifacts left by past U.S. missions. NBC?s Brian Williams reports.
>>> nasa is taking steps now to preserve the steps they took decades ago on the surface of the moon. they're protecting american landing sights on the moon. presumably because you never know who or what will go back there. and there's a number of missions vying to go back with unmanned craft. they just wanted to declare the area off limits. neil armstrong 's footprints will never fade. they want to make sure they and all the others will remain undisturbed.
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