He was not a member of the Communist Party or even a 'fellow traveler'.
I struck up a conversation with one of my 'fellow travelers'.
The airport can handle large numbers of 'travelers'.
(..) - What's happening? - They used her thumbprint to assess her ID. Since thumbprints never change, they assume she's the future Jennifer. MARTY: We got to stop them. How? Tell them we're time travelers? They'd have us committed. COP: She's clean. We take her home. PARTNER: To Hilldale? (..)1989 Back to the Future Part II