A Northrop Grumman SMART Demo static test is part of a company program to advance manufacturing of propulsion technologies. Credit: Northrop Grumman

WASHINGTON — The Pentagon has warned that shortages of solid rocket motors could constrain plans to sharply increase missile production. One of the industry’s largest suppliers says the bigger challenge may be how the government buys them.

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Sandra Erwin writes about military space programs, policy, technology and the industry that supports this sector. She has covered the military, the Pentagon, Congress and the defense industry for nearly two decades as editor of NDIA’s National Defense...