"As a result of pilot shortages, thousands of flights have been delayed or canceled, wreaking havoc on travel plans for millions of American taxpayers," House of Representatives' Oversight Committee Chairwoman Carolyn Maloney and Coronavirus Crisis Committee Chairman James Clyburn wrote in a Sept. 8 letter to Treasury Department's inspector general.

(Reporting by David Shepardson; writing by Susan Heavey; Editing by Doina Chiacu)