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“Sierra Nevada”

Aug 29, 2014 06:00 AM ET // Irene Klotz
A three-way race to build a commercially operated spaceship to shuttle astronauts -- and other paying customers -- to and from low-Earth orbit is close the finish line, with NASA aiming to award development and flight service contracts as early as next week.
Apr 15, 2014 11:30 AM ET // Discovery News
A new book pays tribute to Ansel Adams and the wilderness area in California that is named for him.
Apr 19, 2011 03:15 PM ET // Irene Klotz
For years, Elon Musk has been saying that three years after the government puts up the cash, he could have a new ride for astronauts ready to fly. On Monday, NASA took him up on that pledge.