Thanks, Glenn, and good morning, everyone. I'd like to start today with an overview of our recent financing activities. Last week, we closed the previously announced exchange transaction. I'll hit on the major highlights now. Nearly 87% of the 2022 Senior secured notes were tendered in exchange offer. Noteholders who participated in the exchange receive a pro rata share of both the 10% senior note secured by Wilpinjong and a 8.5% senior secured notes issued by Peabody as well as additional cash consideration. This resulted in the issuance of $194 million of new senior secured Wilpinjong note and $195 million of new senior secured Peabody note, both due December 2024. The $60 million of 2022 notes that did not participate in exchange are now unsecured, and will continue to be paid a 6% coupon until March 2022. The $540 million revolving credit facility commitments were also exchanged for $206 million of senior term loans secured by Wilpinjong, a $324 million letter of credit facility, and $10 million of cash consideration. With the completion of the exchange transactions, the global surety agreement has also been locked in. For the terms of that agreement, we posted $75 million of additional collateral in December in the form of letters of credit, and will post an additional $25 million per annum through 2024, subject to an increase to the extent that company generates more than $100 million of free cash flow in any 12-month period, or as assets sales greater than $10 million. In turn, the Surety providers dropped outstanding collateral requests, and have further agreed not to request additional collateral on existing bonds, or cancel any bonds throughout the duration of the agreement. Taking a step back, that leaves us with a $60 million maturity in March 2022, $595 million of secured debt due December 2024, and $889 million of secured debt due March 2025. Within the next two weeks, we will make an offer to repurchase 22.5 million in principal amount of the new Peabody note at a price of 80% of par. We also have the $324 million letter of credit facility, and a $250 million accounts receivable securitization facility. At December 31, we had $709 million of cash and cash equivalents. This capital structure provides the foundation for future value creation and the flexibility needed to continue to pursue operational improvements across the platforms, but particularly within our met segment, and captured expected seaborne and market improvement, Glenn mentioned. With that recap of our financing activities, I'd now like to turn to segment performance for the fourth quarter, beginning with seaborne thermal results. Once again, our seaborne thermal segment delivered strong fourth quarter cost performance, with cost per ton of $27, 12% lower than the prior-year. In total, the seaborne thermal segment sold 5.2 million tons, with 3.2 million tons exported. While, margins were impacted by weaker pricing, the segment delivered 24% adjusted EBITDA margins or $45 million of adjusted EBITDA. Wilpinjong contributed sales of 3.6 million tons and adjusted EBITDA of $21 million. In addition, the mine achieved an all-time low for Australian dollar cost per unit of $4.40 for the full-year, further demonstrating the mine's first [indiscernible] cost performance among Australian thermal coal mines. Seaborne met results were negatively impacted by weak pricing and demand idling Shoal Creek, the plant longwall move at Metrop and mine sequencing at the CMJV. For the quarter, met costs totaled $107.30 per ton, and only 1.4 million tons. As a result, the segment reported $34 million of negative adjusted EBITDA. Our U.S. thermal mines performed incredibly well despite tough demand conditions and COVID-related challenges. The PRB segments shipped 22 million tons, at an average adjusted EBITDA margin of 20%. The PRB reported adjusted EBITDA contributions of $52 million on strong productivity and disciplined cost control. In fact, North [ph] and Caballo both achieved record annual unit costs in 2020. The other U.S. thermal mines generated $45 million of adjusted EBITDA. Compared to the prior-year, cost per ton was 25% lower, largely due to the Kayenta settlement resulting in elevated costs in the prior-year. Even without the Kayenta settlement impact, costs were still over $2 per ton lower year-over-year in large part due to ongoing cost management efforts. Barron and El Segundo also achieved record annual costs per unit in 2020. A quick note on U.S. thermal mine productivity, as measured in units per employee shift, 2020 was 5% higher than 2019 despite 14% lower total units. During the fourth quarter, we recorded a non-cash impairment charge of $69 million related to unassigned coal reserves in the Midwest that were not in our mine plans. Loss from equity affiliates totaled $34 million, including a $33 million reserve on tax assets at Middlemount which has been excluded from adjusted EBITDA. Now let's turn to our 2021 outlook. Starting with the U.S. thermal assets, we're planning for PRB volumes to be largely in line with 2020 shipments of 87 million tons. About 80% of those volumes are priced at an average of $10.82 per ton. Other U.S. thermal shipments are planned to decline from 2020 levels, in part due to plant retirements. Currently, we have 16 million tons priced at an average realized price of $37.50 per ton. U.S. thermal shipments will ultimately be dependent on general economic conditions, natural gas prices, weather, and other factors. Although recent conditions are favorable, we had a relatively warm start to winter and utilities have expressed adequate coal stockpiles, both of which are expected to impact first quarter 2021 shipments. From a cost perspective, we expect both PRB and other U.S. thermal costs to be largely in line with 2020 levels. Seaborne thermal volumes are expected to decline given Wambo's transition to the United Wambo joint venture. We anticipate our share of the coal could be about 2 million tons this year. However, underground volumes are anticipated to increase modestly, partially offsetting the transition to the surface joint venture. Wilpinjong volumes are expected to remain in line with 2020. We anticipate a slight increase in seaborne thermal costs, given lower volumes and higher royalties associated with an expected improvement in pricing. Despite this modest increase, our seaborne thermal segment is expected to deliver strong adjusted EBITDA margins in 2021. As mentioned earlier, both Shoal Creek and Metrop are idled. We're cautiously evaluating market conditions and will be deliberate in determining future production plans at those mines. Prior met volume projections assume that Shoal Creek resumed production in early 2021 and that Metrop was operational for the full-year. In 2020, those mines shipped a total of 2.3 million tons. On the other hand, we're planning for slightly higher CMJV shipments in 2021 and could move more if conditions are favorable given inventory levels. From a corporate perspective, we anticipate further reductions in SG&A with annual spend targeted at $90 million. Full-year capital expenditures are anticipated to be approximately $225 million, including about $135 million related to mine extension projects. With a new capital structure, cash interest expense is anticipated to be about $115 million. Taking a quick look at just the first quarter of 2021, results are expected to be down from the fourth quarter, given lower volumes across each of the segments. Our U.S. thermal customers generally take higher volumes in the fourth quarter to meet their full-year commitments. Together with a slower start to winter, we expect first quarter shipments to decline, modestly. Seaborne thermal shipments will be impacted by lower volumes from the United Wambo JV. Met shipments are expected to be lower due to the suspension of production at Shoal Creek and Metrop, which combined shipped about 600,000 tons in the fourth quarter. Indeed, 2020 has been an extremely challenging year. Those challenges were met with decisive action and while we still have our fair share of headwinds, we remain laser-focused on further reducing costs and improving cash flow to best position the company for success in all market cycles. I'd now like to turn the call over for questions. Operator?