Okay, thanks, Brian. Obviously hindsight is 2020, and I think mine is as good as anyone else. But I'll comment briefly on what I think is different about our plan. First of all, I will say that I think our plan is dramatically different than we've seen previously, in terms of what I've looked at. I would say there's a couple of big ones. The first one is that we are obsessed with the customer. Everybody on this stage is obsessed with the customer. We are going to drive that deep into the organization. We may have said we were obsessed with the customer in the past, but I think there's a lot of evidence that would say that we were not obsessed with the customer in the past. And that's probably job one, is to drive that, as I mentioned earlier, deep into the organization, ensure that it's a filter that we put every single decision that we make through the entire Company. Secondly, we really didn't have a cohesive strategy, that I could gather, over the last several years. That caused us to make significant shifts in direction frequently over time. And when you're shifting a large organization of 75,000 people, it gets very difficult to get any kind of momentum around the agenda. Third, when you have that going on, it really starts to compromise the execution. Because you're trying different things, and different priorities take a different level of energy at any given point in time. I can tell you, the number of things we were measuring was significant. The number of input metrics we were trying to accomplish was a very long list, and it did vary quarter in, quarter out. So that, over time, reduces the amount of accountability that people inside the organization have to deliver against those goals, and it starts to compromise the overall ability to get things done and to achieve the margin expansion goals that were outlined. I think those are the big things that I would observe. Customer service is going to be or obsession with the customer, really, going forward, is our agenda. We have a cohesive strategy now. We're going to be focused on operating metrics and execution that are required to deliver against that. We do have to build the culture of the organization to be really focused on not just the customer, but to have a very high level of accountability, of ownership and drive for results. And that will be different going forward.