US Air Force personnel do not wear metal "US" insignia on their shirt collars as the Colonel Hecker does on Air Force One. The US insignia are only worn on the lapels of service coats.
Two characters are walking in a rural area because their car has a flat tire and there is no cell phone service in the area. The road has very urban-looking street lights. Also, with no cell phone service, the FBI is able to locate the characters with pinpoint precision.