Did you see this? Unbelievable.
Oh yeah. I saw this. Arrogance on a stick.
It means they think he may have been symptomatic on at least one of his flights. And ‘entered the country on Sep 20’ doesn’t NECESSARILY translate into landed at DFW on the 20th. He could have stayed in the DC area for a time. And any time further, given his initial ER visit may have been as soon as the 24th, could have placed him being symptomatic on a flight or in/through a major air transport hub.