CST-100 Starliner launch abort engine
A launch abort engine, developed by Aerojet Rocketdyne for Boeing's CST-100 Starliner spacecraft, fires during a 2016 test. A static-fire test of the complete launch abort system suffered a propellant leak at the end of the test.

Boeing confirmed July 21 that there was an “anomaly” during a recent test of the launch abort engines for its CST-100 Starliner commercial crew vehicle that could delay a key milestone needed for the vehicle to be able carry astronauts.

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Jeff Foust has more than a decade of experience writing about space policy, entrepreneurial ventures and regulatory affairs. In 2001, he established spacetoday.net to aggregate and summarize the day's space-related news stories. In 2003, he started The...