CBC.  The Mackenzie Valley natural gas pipeline faces a key decision this week as the National Energy Board is expected to say whether it approves the proposed project.  The board, which regulates parts of Canada's energy sector, is expected to release its decision sometime this week on whether the $16.2-billion pipeline being proposed in the Northwest Territories would be in the interests of all Canadians. ... "Certainly we'll be looking for a favourable decision on the pipeline," said Fred Carmichael (NGP Photo) of the Aboriginal Pipeline Group, which represents three N.W.T. aboriginal [...]