During a very warm part of the Cold War, a relative in service in Germany got a visit from the services security agency. They put him in a room and grilled him

During a very warm part of the Cold War, a relative in service in Germany got a visit from the services security agency. They put him in a room and grilled him and eventually asked “why didn’t you tell us you had relatives on the other side of the wall?” He asked where, and informed them they were all presumed to have died in WWII. They informed him one of his cousins was a near counterpart on the other side and provided a village name. Then they asked “would you talk to your parents and tell them to tell the neighbors it’s ok to talk to the G-Men”. The FBI had apparently been going thru his tiny upstate hometown and scaring all the Polish/Czech/Slovak/Latvian/etc emigre neighbors who spoke little English. Of course he didn’t tell them his sister wrote a letter to that village, re-established contact and then she, her husband and pre-teens (who only spoke English) flew over to Europe and took a train to visit. Thankfully everyone on the train distracted the security officials whenever they got near the kids.