<http://schema.org/description>
"Pratt and Whitney reports its F100-PW-220U engine and exhaust system successfully powered the X-47B Unmanned Combat Air System for U.S. Navy."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.upi.com/Business_News/Security-Industry/2011/11/29/Pratt-Whitney-powers-X-47B-system/UPI-85201322566379/>