it is the pro afterle of the key stone xl pipeline designed to bring the tar sands of canada down to the gulf of mexico. tar sands are dirtier more carbon intense form of oil. and creating in pipeline would be in the words of nasa climate scientist james hansen, would be like creating the fuse to the biggest carbon bomb on the planet. people in the know had supposed all along that keystone was a done deal, but a remarkable group of activist delaying it at every turn and continuing to mobilize to delay it which in turn has made it into a top tier issue for republicans who simply cannot understand why we are still not pumping canadian oil sand into texas already. >> you know there's one major shovel-ready project ready to go, and that's the keystone pipeline. >> called the keystone xl pipe line. it is a no brainer, it has been blocked by the obama administration now for four years. >> we are absolute committed as republican team to keep the keystone pipeline on the front burner. >> approving this pipeline seems