Hugh Brown, a communications specialist with NASA during Apollo 11

Weeks before the historic Apollo 11 launch, Brown's team, which maintained communication between mission control and the spacecraft, detected Russian interference that put the mission at stake.
2:03 | 04/23/19

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Transcript for Hugh Brown, a communications specialist with NASA during Apollo 11
We have problems program was designed to. Sets America apart from all of them that countries in the world. My name issued Emil brown and in 1960. I was at Kennedy space. The Russians were very aware. What was going on in our system they add to. Obviously means to pick up date it cuts intelligence. Couple weeks before alliance back we get to play written it as does make sure they are all functional. Before the vehicle on. The astronauts were in this capsule. So it was isn't absolutely critical. That everything happened operate precisely. We found that as the astronauts were communicating with lunch controls. The signals were being changed. Malfunction like to monitor and a controlled senate. Indicating that we might have a communication problem that the logic that. There transmission group being its about it. It's leads to major. And as we scared around we picked it out out in the ocean. And we dispatched its Coast Guard Angela behold it was Russian trawlers out of Atlantic Ocean. They did you communications. NASA's. Launch admission is at stake. Once they do real eight. It fortunately for us debt did out of Perry can't. Apollo plant in a room with a successful. And I believe there is due in part to defect and we were able to identify the source of tension.

This transcript has been automatically generated and may not be 100% accurate.

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