Thank you, Jonathan. Welcome to Chevron's fourth quarter earnings conference call and webcast. On the call with me today are Pat Yarrington, Vice President and Chief Financial Officer, and Wayne Borduin, General Manager of Investor Relations. We will refer to the slides that are available on Chevron's website. Before we get started, please be reminded that this presentation contains estimates, projections, and other forward-looking statements, please review the cautionary statement on Slide 2. Back in March, I laid out Chevron's strategy to win in any environment. I outlined our three compelling strengths, an advantage portfolio, sustainability at lower prices, and a strong balance sheet. I also indicated that the combination of these distinct advantages together with the commitments to action highlighted in blue will deliver growing free cash flow and shareholder returns. In 2018, we delivered. We grew oil and gas production by more than 7% achieving our highest ever annual production. We grew cash margins in our operated upstream assets, contributing to an improvement in cash returns. We lowered our unit costs and we sold $2 billion of assets. These outcomes yielded record free cash flow, a dividend increase and the initiation of the share repurchase program. 2018 was a very successful year and we intend to build on this momentum in 2019. Turning to Slide 4, a view of our sources and uses of cash. Excluding working capital, we generated over $31 billion in cash flow from operations when we achieved record free cash flow of nearly $17 billion, the highest level ever achieved by Chevron in any price environment. This allowed us to deliver on all pore of our financial priorities. For the 31st consecutive year, we maintained our commitment to dividend growth and paid out 8.5 billion in cash dividends to our shareholders. Earlier this week, we announced a $0.07 per share increase in our quarterly dividend to $1.19 per share, representing a 6% increase. Second, we allocated capital across a diverse portfolio and funded our highest return projects. We have confident these investments position us for sustainable growth and free cash flow. Third, we strengthened our balance sheet and paid down debt by 4.5 billion. Finally, we began repurchasing shares in the third quarter and increased the rate in the fourth quarter, demonstrating further confidence in our future cash generation. With that I'll, turn the call over to Pat who will take you through the financial results. Pat?