<http://schema.org/description>
"The U.S. National Aeronautics and Space Administration said it has successfully tested a cryogenic propellant tank made of composite materials instead of metal."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.upi.com/Business_News/Security-Industry/2013/07/03/NASA-tests-new-cryogenic-propellant-tank/UPI-98121372872703/?st_rec=76491373280732>