Tammy, I'll take a shot, and if you want to chime in, please do on both of those. I would admit to you all that it is -- the year is off to a very concerning start, when it comes to headlines around the world. It's almost as if we're living in a different dimension here at Southwest, and from what I've heard from some of our competitor reports too. So our business continues to be strong, but I will quickly admit that there are concerning headlines around the world. So then you translate this to oil prices and living in Texas my entire life, this is an oil and gas state, and yes, it is concerning, the impact it will have on companies and debt payments and jobs and so on. There's no question that the United States has benefited from the oil and gas boom that was occurring over the last X number of years since the -- really since the recession. So yes, that's all a concern that no doubt you have. We share that. But at least in terms of seeing any manifestation of that in our business, we just – we don’t see it. Even our oil and gas markets, if you want to call them that, produced very strong results in the fourth quarter. Several of our markets have year-over-year -- our yield pressure if you will. So that's not unique to those markets, but they still produce very, very handsome returns. But yes, it's just something we're going to have to keep our eye on. And I offer that background, just as an acknowledgment that we're just living in a world where we need to continue to be alert and be cautious. I will then follow-on and say that we feel like our plan for 2015 was sound and it turned out to be so. We think that the follow-on plan for 2016 is also sound. It is more conservative then what we had committed ourselves for last year. And as Tammy and I have both reiterated, we’ve not made any change with our capacity outlook. And especially for 2016, we’re still right in the 5% to 6% range, and I think all of us would be prepared that if for whatever reason travel demand weakens, then we would want to address that, and then at least discuss what kind of options we have to react on the down side. But in terms of taking advantage, further advantage of low energy prices and boosting our capacity, we don’t have any plans to do that. Tammy, before we go into the second question, anything you would like to add?