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MENLO PARK, Calif. (KYMA, KSWT, KECY/NBC News) — In the future, California firefighters may battle blazes with all-electric engines.

On Thursday, the world’s first all-electric fire truck made a stop at a fire station in Menlo Park.

This vehicle is one of a kind. It looks, and functions, differently than any other fire truck currently on the streets. It also smells different, and Chief Harold Schapelhouman says that’s a good thing.

Chris Long is an IT worker in the Washoe County Sheriff’s Department in Reno, Nevada. But all the DNA in his semen belongs to a German man he’s never met.

That’s because Long received a bone marrow transplant from the European stranger four years ago — and the unexpected impact it has had on his biology could affect the future of forensic science.

According to a newly published New York Times story, the purpose of the transplant was to treat Long’s acute myeloid leukemia, a type of cancer that prevents the body from producing blood normally.