Does anyone have a reference to a document that states
what kinds of flights require a visa?
I ask as I'm in the US frequently on business, and enter on the
Visa-Waiver scheme. I recently phoned a school to see about
a dual flight just to sightsee and try to maintain some semblence
of currency, but was told that ALL dual flights require a visa.
That didn't ring true, as I thought that people who were
doing a rental check-out or BFR didn't need a special visa,
but of course I don't have a reference to the "official" document...