* The most metal of rockets has gone into the great mosh pit in the sky Ars Technica
* Ending an era, final Delta 4 Heavy boosts classified spy satellite into orbit CBS News
* Delta IV Heavy launch recap: Historic final rocket flight from Cape Canaveral, Florida Florida Today
* 'Heavy' history: ULA launches final Delta rocket after 64 years (video, photos) Space.com
* Delta rockets retired with launch of US reconnaissance satellite Reuters
http://dlvr.it/T5PrfD
* Ending an era, final Delta 4 Heavy boosts classified spy satellite into orbit CBS News
* Delta IV Heavy launch recap: Historic final rocket flight from Cape Canaveral, Florida Florida Today
* 'Heavy' history: ULA launches final Delta rocket after 64 years (video, photos) Space.com
* Delta rockets retired with launch of US reconnaissance satellite Reuters
http://dlvr.it/T5PrfD