COVID-19 Pandemic: Preliminary Observations on Efforts Toward and Factors Affecting the Aviation Industry's Recovery, Statement of Heather M Krause, Director, Physical Infrastructure, Testimony Before the Subcommittee on Aviation, Committee on Transportation and Infrastructure, House of Representatives [open pdf - 296KB]
From the Highlights: "International flight restrictions, local stay-at-home orders, and a general fear of contracting and spreading COVID-19 [coronavirus disease 2019] through air travel had a sudden and profound effect on the aviation industry. According to Department of Transportation statistics, passenger traffic was down 60 percent system-wide in 2020 compared to 2019. This reduction in demand has affected airlines, airports, and the entire aviation supply chain. This testimony is based on ongoing work and provides preliminary observations on the: (1) actions that businesses across the aviation industry have taken to respond to reduced passenger demand, (2) factors that may affect industry recovery, and (3) considerations for federal support to the aviation industry."
Government Accountability Office: http://www.gao.gov/