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A model of a concept space station made with Bigelow Aerospace habitat modules is on display at the company's headquarters during a news conference, Wednesday, Jan. 16, 2013, in Las Vegas. NASA has awarded a contact to Bigelow Aerospace to provide NASA with a Bigelow Expandable Activity Module, a habitat module for the International Space Station. (AP Photo/Julie Jacobson)

Associated Press
A model of a concept space station made with Bigelow Aerospace habitat modules is on display at the company's headquarters during a news conference, Wednesday, Jan. 16, 2013, in Las Vegas. NASA has awarded a contact to Bigelow Aerospace to provide NASA with a Bigelow Expandable Activity Module, a habitat module for the International Space Station. (AP Photo/Julie Jacobson)
A model of a concept space station made with Bigelow Aerospace habitat modules is on display at the company's headquarters during a news conference, Wednesday, Jan. 16, 2013, in Las Vegas. NASA has awarded a contact to Bigelow Aerospace to provide NASA with a Bigelow Expandable Activity Module, a habitat module for the International Space Station. (AP Photo/Julie Jacobson)
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