This post lends some credibility to "BB" View Point. <a href="http://energy.ihs.com/NR/rdonlyres/CD6B101F-89AC-4A57-B08B-10F95D81DD52/0/AngolaNigeriaAH.pdf" rel="nofollow" target="_blank">http://energy.ihs.com/NR/rdonlyres/CD6B101F-89AC-4A57-B08B-10F95D81DD52/0/AngolaNigeriaAH.pdf</a> Sneak