U.S. regulators say there could be structural issues with the Keystone Pipeline and have issued a corrective action order to its operator, South Bow Corp , after an oil spill in North Dakota shut the key conduit for the flow of Canadian oil to the U.

It’s always nice when old friends of the shebeen drop by to call. Even better when two of them together pay us a surprise visit. On Tuesday, who should come riding in on the news but our old friends Canadian tar sands and the Keystone family of pipelines.