There are quite a few US preclearance facilities overseas. Dublin, Abu Dhabi, most major Canadian airports, etc. https://en.wikipedia.org/wiki/United_States_bo

There are quite a few US preclearance facilities overseas. Dublin, Abu Dhabi, most major Canadian airports, etc. https://en.wikipedia.org/wiki/United_States_border_preclearance https://en.wikipedia.org/wiki/United_States_border_precleara...