A Russian satellite is probably stalking a US spy satellite in orbit

On January 20, something rather strange happened in orbit. A Russian satellite suddenly maneuvered itself so that it was closely shadowing a US spy satellite. The pair are now less than 186 miles (300 kilometers) apart—a short distance when it comes to space. While we don’t know for sure what’s going on, the Russian satellite’s actions strongly suggest it is there to spy on the US one—and there is very little the US can do about it.
Read more: http://www.technologyreview.com/s/615129/a-russian-satellite-is-probably-stalking-a-us-spy-satellite-in-orbit/?source=Snapzu