Craig Tooley, project manager for NASA's Magnetospheric Multiscale (MMS) mission at NASA’s Goddard Space Flight Center in Greenbelt, Md., discussed the engineering process of building four spacecraft simultaneously at the Aerospace@Annapolis event on Feb. 1, 2013. Tooley sits next to a model of the spacecraft tucked into their launch rocket and a television showing the orbit of MMS as it travels through Earth's magnetic fields. Credit: NASA/T. Cline
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