In this Wednesday, April 9, 2014 photo Great Lakes Airlines equipment sits on the tarmac at Pierre Regional Airport in Pierre, S.D. Great Lakes airlines' struggle with a new set of strict guidelines has inconvenienced travelers and hurt business at the airport. Despite cancellations and drop in routes airport manager Mike Isaacs feels travel will improve and the airport can compel Great Lakes to stay should they try to pull out. (AP Photo/Nora Hertel)
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