More natural gas controversy Pressure from Petrohawk helps cancel World Oil column In an act of extraordinary courage, a top Petrohawk executive threatened to cancel his free subscription to World Oil if the magazine continued to publish my column. Today, John Royall, President and CEO for Gulf Publishing, cancelled my November column. I have accordingly resigned as contributing editor. Heading Out (Dave Summers) and I have been talking about the issues Arthur Berman raises for quite a while now. Most recently, Dave wrote a post called Shale Gas Estimates Perhaps Optimistic - An Interesting...