Phobos-Grunt is intended also to cast an orbital eye on Mars too, but then plop down on Phobos - one of that planet's two moons, scrape up on-the-spot samples and then transport those extraterrestrial tidbits to Earth in July 2012. As it swoops by Earth, the spacecraft is to release a capsule containing all the samples gathered on Phobos, to land on Earth.
However, some fear Russia might contaminate Phobos or Earth by accident if the operation isn't carefully carried out.
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