WASHINGTON — Northrop Grumman is taking another charge related to the solid rocket boosters it provides for the Vulcan Centaur rocket and suggested updated motors might not be ready until the end of the year.

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Jeff Foust writes about space policy, commercial space, and related topics for SpaceNews. He earned a Ph.D. in planetary sciences from the Massachusetts Institute of Technology and a bachelor’s degree with honors in geophysics and planetary science...