And get precleared through US immigration while still within a civilised country? No joking: if the Security Theatre misidentifies me as a notorious enemy of Freedemocracy, I'd rather prove my innocence to just about anyone except US "Homeland Security".
I live in Ireland and travel to the US regularly with work. The US Immigration guys in Shannon and Dublin are still complete dicks, although they are admittedly less of a pain in the ass than the immigration in Newark, but those are the only three US immigration I've been through. To be fair though, if you want a tough stance on the people you want to let into your country, complete dicks are just the kind of people to do that job well.
A holding company is a thing where you hand an accomplice the goods while the policeman searches you.