The Senate Commerce, Science, and Transportation Committee held a hearing on Wednesday questioning FAA Administrator Stephen Dickson on his agency’s oversight of aircraft certification. It was really all about how he and his agency have responded to congressional inquiries into its handling of Boeing’s 737 Max, which has been grounded since March 2019.

Committee members accused the FAA of stonewalling their requests for documents and more. Chairman Roger Wicker, a Republican from Mississippi, said Dickson demonstrated “at best an unwillingness to cooperate with congressional oversight,” while Sen. Ed Markey, a Democrat from Massachusetts, suggested Dickson may be part of a cover-up.