Well, I don't think, Jamie, that there's a fundamental structural problem. I mean, all things being equal, high concentration to hub is a good thing, there's no question about it. But it's also important to have hubs in the key business markets. It's important to have a good mix of local inflow traffic. We do that. So no, I don't think there's a fundamental structural problem. Now there are issues with geographic locations for winter storms, I will grant you that. We've got west to east, Denver, Chicago and Cleveland, New York and Dulles all in a row. And some of our friends in the south did not have that difficulty. But I don't think there's a fundamental structure there. I think from us, it's a lot of basic blocking and tackling, getting our operational integrity humming and we're clearly making progress there. And certainly, Greg Hart is here, if he wants to comment on that. But we clearly are focusing on tuning all of our revenue initiatives. And Jim and his team are working very hard on that. Making -- we operate really inefficiently today, Jamie. And that's what Project Quality is all about, bringing quality and efficiency, elimination of defects all across the system. We also candidly are still operating with a number of parallel systems, processes, leftovers from the merger that we need to conclude and those drive inefficiencies and they drive costs. And our customers service, historically, since the merger, has not been as good as it should be. And we're spending a lot of time and money and effort training our folks. And this year, importantly, we're bringing in a third party which will objectively measure us against those customer service standards . We're going to establish a baseline to would help us improve customer service. But if you've got -- if you have some -- the lack of operational reliability which is historically, which we're improving a great deal, that drives a lot of cost and a lot of dissatisfaction which drives away revenue and improves costs. So in answer, no, I don't think we have structural problems. I think we are -- I think we've identified all the areas where we need to improve. We have very good, very disciplined, very rigorous plans to attack each of those areas and I am very confident that we will.