I'm an Argentinean citizen with permanent residence in Canada and currently residing in Toronto. I have a B2 US visa that will expire next year.
I crossed the border to the US last February and they stapled a white paper to my passport with an expiration date for July 31 2009. I've heard that I have to renter the US before the expiration date to not run into problems. But I'm afraid I won't have the time to do so.
My question is: If I let it expire, what will happen the next time I go to the US?
Your help is highly appreciated.