WASHINGTON — NASA’s Robotic Refueling Mission, a space station-based demonstration effort caught up in a cascading series of delays following the last summer’s crash of a Russian cargo module, will finally begin its first on-orbit satellite servicing tests in March, the project’s lead said.

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Dan Leone is the NASA reporter for SpaceNews, where he also covers other civilian-run U.S. government space programs and a growing number of entrepreneurial space companies. He joined SpaceNews in 2011.Dan earned a bachelor's degree in public communications...