keith palmer who lives in a store in queens here, you just got in from south africa which is not on the list of countries that are of concern. you got all the way home, they called you to come back. why and what happened? >> well, i got off the flight and i made it through customs pretty cleanly and easily, got all the way home, received a phone call from an officer with customs and border protection who said, we'd like to give you a test to see if you are someone who has been exposed to the coronavirus. >> reporter: any indication why? >> he didn't say. he said, we've tested some other people on the plane. >> reporter: so you think, great. >> great, i'm going to get one of these coveted tests, i'll know if i've been exposed. he said, it would be prudent for you to come back. >> so you went all the way home and came back. nobody wants to come to the airport on a good day. then they swabbed your nose and mouth. they then said, you can be on your way. i said, i thought you would tell me if i've been exposed to covid-19. they said, no, no, it's just a screening. >> reporter: they also had