So, on cash, David, a couple of things, right. Just to reinforce, we feel good about the ability of the business to generate cash flow, as we work up the recovery curve here in the pandemic and as Greg said earlier, we remain committed to the $18 billion to $20 billion of cash being returned to shareholders. That said, at a high level, yes, we would expect 2021 cash to be better than this year. But that said, without giving you a number per se, let me give you a couple of the moving pieces just for folks to think about for 2021. So, kind of along the lines of Myles' question about the cost actions, the majority of the savings related to the planned cash actions this year we think are sustainable for next year, right. So kind of a push, if you will, on a year-over-year comparative basis. That said, we will have some non-recurring cash items of that $1.2 billion to $1.4 billion. There could be $500 million to $600 million of that that would extend next year. That would be a headwind. The way we're thinking about CapEx, we have a goal to keep it on an operational basis similar levels as 2020. I just mentioned that given the strength of our cash flow this year, we maybe have some flexibility in our considering a discretionary pension contribution. And in part, pension, while it will still be cash flow positive next year, it won't be as positive there. There is, call it, $850 million of headwind due to higher required contributions that again depending upon how we see this year playing out, we may address this year and we will see some incremental spend on the structural actions related in particular to the couple of things Greg mentioned about the new facility and how we're thinking of our office space, as well as synergies. Again, that could be $0.5 billion in that ballpark there. From a working capital point of view, we would expect or do expect improved turns in 2021 where we're -- believe we're going to be able to sustain current levels of working capital until we see the volume start to recover. So, still a lot of moving pieces and of course, the other thing here, we've had a really strong year in cash on the defense side of the house. Some of that's timing. So we're going to have to factor in how sustainable that is over the 2021 timeframe. And of course again probably the biggest variable here is the shape of the recovery and how the volumes come back in the related cash flows. So a lot of moving pieces here and as Greg said, we'll quantify on this tier on our Q4 call in January.