Visa Versus Waiver Program
Sorry for any confusion on this, however residing both sides of the Atlantic and having a friend whom works in CBT advised me that regardless of any training,
The Visa Waiver program (Green form filled out) is designed for visitors only, this type of Visa waiver is for people visiting the country in the purpose of vacation etc.
Regardless of what CBT officer reviews your passport on arrival its open to review etc.
The Correct method is to obtain a crew visa or a B1 B2 Visa.
Border control also want to see a return ticket if non resident.
All of these new rules are post 911, they want to know who is doing training and where etc.
I guess we all have to put up with this in post-911.