Over the years, our reports have included Standard Disclosures from the Global Reporting Initiative (GRI) Sustainability Reporting Guidelines. In 2016, we moved our standardized reporting to follow SASB guidelines. These standards, available in provisional form for 79 industries including airlines, identify material sustainability factors that are likely to impact financial performance. Designed to be cost-effective for companies and decision-useful for investors, SASB provides both parties the ability to compare and benchmark performance. In 2017, we were among the first companies to introduce voluntary climate-related disclosures recommended by the Task Force on Climate-related Financial Disclosures (TCFD). The TCFD standards seek to improve market understanding and analysis of climate-related risks and opportunities by developing disclosure recommendations that are useful to stakeholders in understanding material risks.