This image provided by the Adler Planetarium on Thursday, April 7, 2011 shows a proposal for a space shuttle exhibit in Dayton, Ohio. As the 30th anniversary of the first space shuttle launch draws ... more 
This image provided by the Adler Planetarium on Thursday, April 7, 2011 shows a proposal for a space shuttle exhibit in Dayton, Ohio. As the 30th anniversary of the first space shuttle launch draws near, the focus is not so much on the past but the future: Where will the shuttles wind up once the program winds down? less 
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Associated Press | Photo By Adler Planetarium
Thu, Apr 7, 2011 5:22 PM EDT