99% or more of the visa applicants we interviewed in India were Indian. We interviewed them in India so that we had access to local staff who spoke all major Indian languages, a fraud unit well-versed in authenticating local documents, and connections to local authorities for more complex cases.

Nothing is "easy" when you have a line of hundreds of people who have been waiting months or over a year for their appointment and you have 120 seconds to deal with them in a fair and respectful way (which unfortunately does NOT always happen), while you also have personal job repercussions if you fail to properly vet their application and miss an important national security related detail.

As it turned out, we flagged enough of those cases as a patern for further review that did result in us consulting with our staff in the third country and discovering the issue. Also, visas that are issued can be revoked, or flagged for further scrutiny by CPB if necessary.