SpaceX Dragon 2 (left) and Boeing CST-100 capsules.

NASA has lifted an order that halted work on commercial crew contracts awarded last month to Boeing and SpaceX, saying that delaying work during an ongoing contract protest could jeopardize the operation of the international space station.

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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...