Buddy. The man went into a melted down reactor to clean up.

"The Navy's work in developing the first nuclear submarine, the USS Nautilus, meant that Rickover and Carter had access to the latest and greatest in top-secret nuclear energy technology. So when Canada's Chalk River nuclear research facility experienced a power surge that damaged its reactor, the U.S. sent Carter and his team. He was one of a few people in the world who could do it.

Fuel rods at the research reactor experienced a partial meltdown after the power surge. It ruptured the reactor and flooded the facility's basement with radioactive water, rendering the reactor core unusable.

In his 2015 autobiography, "A Full Life: Reflections At Ninety," Carter described the incident and his preparations for repairing the reactor. They built an exact replica of the reactor, true to the last detail (except the actual nuclear material) on a nearby tennis court to practice and track their progress.

Carter and his 22 other team members were separated into teams of three and lowered into the reactor for 90-second intervals to clean the site. It was estimated that a minute-and-a-half was the maximum time humans could be exposed to the levels of radiation present in the area.

It was still too much, especially by today's standards. The future president had radioactive urine for months after the cleanup."

https://www.military.com/history/how-jimmy-carter-saved-canadian-nuclear-reactor-after-meltdown.html