Here's another sighting from the airport in Atlanta. I don't see it in the live sightings thread, so I don't think it was posted earlier.
designlovefest @designlovefest · 10h
just saw a bunch of amazing race peeps running through the airport being filmed. which was fascinating. #otherwiseverybored #herewaytooearly
3:37 PM Pacific Daylight Time - 1 Jun 2014
Earlier tweets talked about going to Atlanta, so I expect that's where the sighting occurred.