Actually, I did a bit of research about PBM after you had said Jetliner that it was no longer required in the US. All bags are screened in Europe and yet they retained PBM.
What was the reason is was dropped in the US? Money. The US airline industry felt that it could cause delays and was too costly. There was considerable opposition by US security experts (and the FAA initially) to this change, as it was felt that to rely on any one method and hope that it would be 100% effective is poor security management. But, the mighty dollar wins.
There is also a rather touching assumption in the US that terrorists are all muslim extremists and that somehow domestically they are at less of a risk. I am not sure how Timothy McVeigh and some of the oddballs who live in the wilds of Montana for example fit into this stereotype.
I was utterly shocked to find that PBM has been dropped by the US airline industry for financial reasons. Yet more reasons to avoid US based airlines unless there is a no alternative.
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