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Story summary
- Fog caused an hourlong ground stop at Reagan National Airport on Friday, affecting many travelers.
- Joseph R. Biden Jr. was among those affected as he was en route to Columbia, South Carolina, for a Democratic Party event.
- Biden interacted with passengers during the flight, receiving warm greetings and handshakes.
- The situation shows that presidents receive lifelong Secret Service protection, but private travel options are not guaranteed after leaving office.
