I travelled globally a lot for work, many borders and often laden with many trunks of equipment - getting stopped for inspections, often driven by curiousity, was par for the course.

The grilling by US security types was a "feature" of crossing any US controlled border space for a number of years after this: https://news.ycombinator.com/item?id=46597539 in 1998.

You spend one month at ground zero for 11 nuclear tests that caught most of the five eyes by suprise and that's all they ever seem to ask about forever.