Antimatter has been transported for the first time

https://www.nature.com/articles/d41586-026-00950-w

Antimatter has been transported for the first time ever — in the back of CERN's truck

Physicists have succeeded for the first time in transporting the most expensive and most volatile substance on Earth — antimatter.

If containment was to fail, it the total energy released would have been approximately 2.766 * 10 ^ -8 J, so it wasn't particularly dangerous
It was on the radio here (I live on its route)- the ‚receiving’ physicist said it would be way less than what we catch anyway from daily cosmic radiation.