Robert_Sumwalt February 5, 2018Stephen Repetski1 Min Read NTSB Chairman Robert Sumwalt. Photo: AVweb Share This! Facebook Twitter ReddIt Google Plus Pinterest LinkedIn NTSB Chairman Robert Sumwalt. Photo: AVweb Share This! Facebook Twitter ReddIt Google Plus Pinterest LinkedIn SlackJoin us in the newsroom? Grasswire is an open newsroom. We collaborate online in an open Slack channel where we pitch, source, verify, write and edit stories. Join us on Slack! 0 / 1857 Tweets
