David A. Zapico - AMETEK, Inc.
Management
Those are all great questions, Rob. I mean the current M&A environment is very similar to what we've been experiencing the past couple of years. Pricing is elevated. There is plenty of cash-chasing deals. Now with the public market coming back again, that will eventually flow into the private market, but despite this market we've been successful in deploying our free cash flow on acquisitions. I mean, since the – I mentioned in my prepared remarks, since the beginning of 2017 we acquired five companies and deployed nearly $835 million in capital and we're off to a great start in 2018. And our pipeline remains very active. You never know if something is going to transact in the short term, but I expect you'll be hearing from us again this year on M&A. Our strong pipeline along with the M&A processes gives me confidence. And mentioned the larger deals or the size deals that we've been doing, we're going to execute our – we can do either one to execute our strategy. We've opened up our pipeline to slightly larger deals in the $200 million to $300 million revenue range, there will be deployments of capital of $1 billion, but we can keep doing the smaller deals and we can still get the earnings growth because of the way we structured the business and our acquisition process. So, I'm feeling really good about it. And you mentioned finally our firepower, I think Bill mentioned our existing cash and credit facility was about – we have about $1.5 billion in firepower and most importantly, we'll generate another $865 million, $870 million in free cash flow in 2018. So, we really have the firepower. Our net debt-to-EBITDA is about 1.35. Our gross debt-to-EBITDA is 1.85. So, we could deploy 2-plus billion in capital this year, and really the strategy is not capital limited, it's finding those key acquisitions that we can add value to, so we can maintain a return on invested capital of 10% in year three. That's the key hurdle for us. That gives you the return on total capital for the whole business, and AMETEK has extremely strong return on total capital for an acquisitive company, and we maintain that discipline and that discipline is the limiter right now. But we are clearly looking at things and our pipeline's full, and we'll be clear to select the deals that we can make the most – that we can approve the most, but I think the – I'm very optimistic about what I see in our pipeline right now.
Robert Paul McCarthy - Stifel, Nicolaus & Co., Inc.: If I could sneak one more in, just amortization, any update on looking on that and studying that, whether you want to make a move to cash earnings.