[retroam]

From personal experience, the US has been fingerprinting non-US nationals at the airports for a decade now. So NSA has had such a database for a significant time. However, I still doubt they have figured out to hack the iPhone using said database. But this is just my personal opinion...

[vinay427]

Minor nitpick, but as Canada is not part of the US visa waiver program, Canadian citizens are also exempt from fingerprinting when entering the US.