Locate the 2019 form 10-K for Delta Airlines, Inc. (ticker symbol: DAL) from either www.sec.gov or the companys website investor page. For the All sections (Ch. 21, 22, 23, and 24), answer the following questions pertain to Delta Airlines 2019 financial results:

Chapter 22 Changes in Accounting Principles and Estimates

1. Did Delta make any changes in accounting principles during the year ended December 31, 2019 (see Note 1)? If so, what accounting principle(s) were changed or adopted?
2. Does Delta intend to adopt any new accounting principles in the future years (see Note 1)? If so, what accounting principle(s) does Delta intend to adopt in future years?