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Way back when the Union Pacific was "brand new" it had a lot of wooden trestle bridges designed and built by the Chinese contract work crews and their engineers. White men would not take a train across the bridge, and the Chinese sure wouldn't either. They knew. But then, too, black men wouldn't take those trains across figuring that if the whites and the Chinese thought the deal too risky, it must certainly be too risky.
Ended up all the train drivers who would take a locomotive across a Chinese designed and built wooden trestle bridge were Japanese. You can find their descendants throughout the intermountain West in small cities everywhere.
Qualifying for that job depended on how desperate you were and how much faith you had in the Buddhist promise of reincarnation. The Japanese were very desperate and very devout.
The same thing goes on today in hospitals in that little laboratory where the young woman or young man from India assays a tissue or other sample for disease. THey are as desperate and as devout as were those Japanese train drivers.