Thank you, Joe. For the fourth quarter, net income attributable to Valero stockholders was $2.4 billion, or $5.42 per share, compared to $367 million, or $0.81 per share in the fourth quarter of 2016. Fourth quarter 2017 adjusted net income attributable to Valero stockholders was $509 million, or $1.16 per share. For 2017, net income attributable to Valero stockholders was $4.1 billion, or $9.16 per share, compared to $2.3 billion, or $4.94 per share in 2016. 2017 adjusted net income attributable to Valero stockholders was $2.2 billion, or $4.96 per share, compared to $1.7 billion, or $3.72 per share in 2016. 2017 adjusted results exclude an income tax benefit of $1.9 billion from the Tax Cuts and Jobs Act of 2017, while the 2016 adjusted results exclude several items reflected in the financial tables that accompany this release. For reconciliations of actual to adjusted amounts, please refer to those financial tables. Operating income for the Refining segment in the fourth quarter of 2017 was $982 million, compared to $645 million for the fourth quarter of 2016. Excluding $17 million of expenses primarily related to ongoing repairs at certain of our US Gulf Coast refineries to address damage resulting from Hurricane Harvey, adjusted operating income for fourth quarter 2017 was $999 million. The increase from 2016 is attributed primarily to higher gasoline and distillate margins in most regions and wider discounts for domestic sweet crudes relative to Brent Crude, which were partially offset by narrower discounts for medium and heavy-sour crudes versus Brent and higher premiums for residual feedstocks. Refining throughput volumes averaged 3 million barrels per day, which was 156,000 barrels per day higher than the fourth quarter of 2016. Throughput capacity utilization was 96% in the fourth quarter of 2017. Refining cash operating expenses of $3.55 per barrel were $0.19 per barrel lower than the fourth quarter of 2016, mostly due to higher throughput in the fourth quarter of 2017. The Ethanol segment generated $37 million of operating income in the fourth quarter of 2017, compared to $126 million in the fourth quarter of 2016. The decrease from 2016 was primarily due to lower margins resulting from lower ethanol prices. Operating income for the VLP segment in the fourth quarter of 2017 was $80 million, compared to $70 million in the fourth quarter of 2016. The increase from 2016 was mainly due to contributions from the Red River Pipeline, which was acquired in January 2017, and the Port Arthur terminal assets and Parkway Pipeline, which were acquired in November of 2017. For the fourth quarter of 2017, general and administrative expenses were $238 million and net interest expense was $114 million. General and administrative expenses for 2017 were higher than 2016 mainly due to reserve adjustments and a fee for terminating the agreement to acquire certain terminals in northern California owned by Claims All American pipeline LP. Depreciation and amortization expense was $490 million and the effective tax, rate excluding the income tax benefit related to tax reform, was 30% in the fourth quarter of 2017. With respect to our balance sheet at quarter end, total debt was $8.9 billion and cash and temporary cash investments were $5.9 billion, of which $42 million was held by VLP. Valero's debt-to-capitalization ratio net of $2 billion in cash was 23%. At the end of December, we had $5 billion of available liquidity excluding cash, of which $340 million was available for only VLP. We generated $1.7 billion of net cash from operating activities in the fourth quarter. Excluding the favorable impact from a working capital decrease of $800 million, cash generated was approximately $900 million. With regard to investing activities, we made $641 million of growth and sustaining capital investments of which $142 million was for turnarounds and catalyst. For 2017, we invested $2.4 billion of which $1.3 billion was for sustaining, and $1.1 billion was for growth. Our sustaining capital expenditures were $300 million lower than guidance primarily due to lower turnaround costs and hurricane related delays on certain projects. Moving to financing activities, we returned $727 million to our stockholders in the fourth quarter $421 million was for the purchase of 5 million shares of Valero common stock and $306 million was paid as dividends. As of December 31, we had approximately $1.2 billion of share repurchase authorization remaining, including the $2.5 billion of additional repurchase authority approved last week by our board, we have approximately $3.7 billion available for stock buybacks going forward. We expect capital investments for 2018 to be $2.7 billion with about $1.7 billion allocated to sustaining the business, and $1 billion to growth. Included in this total are the turnarounds, catalyst, and joint venture investments. From modeling our first quarter operations, we expect throughput volumes to fall to the following ranges; U.S. Gulf Coast at 1.65 million to 1.7 million barrels per day; U.S. mid-continent at 440,000 to 460,000 barrels per day; US West Coast at 250,000 to 270,000 barrels per day; and North Atlantic at 415,000 to 435,000 barrels per day. We expect refining cash operating expenses in the first quarter to be approximately $4 per barrel. Our Ethanol segment is expected to produce a total of 4 million gallons per day in the first quarter. Operating expenses should average $0.38 per gallon, which includes $0.05 per gallon for noncash costs such as depreciation and amortization. For 2018, we expect G&A expenses, excluding corporate depreciation, to be approximately $800 million. The annual effective tax rate is estimated at 22%. For the first quarter, net interest expense should be about $115 million and total depreciation and amortization expense should be approximately $500 million. And lastly, we expect RINs expense for the year to be between $750 million and $850 million. That concludes our opening remarks. Before we open the call to questions, we again respectfully request that callers adhere to our protocol of limiting each turn in the Q&A to two questions. If you have more than two questions, please rejoin the queue as time permits. This helps us ensure other callers have time to ask their questions.