So I was returning to DC from Saskatoon on Wed. So was my turn to go to the next stall for USA Immigration. Lucky me gets this crusty chick, and I just knew she was a grump,lol and I probably didnt help myself. So I get to her booth, hand her just my Greencard. NEVER have they asked for my passport, so I didnt hand it over. Of course this time she wanted it. So she takes the passport and looks it over with a fine tooth comb, looked at every page. Then she asked where I was coming from?? I explained Canada. She asked why i was in Canada? I stated "I'm Canadian" lol which wasnt the answer she wanted,lol She in a very bitchy tone stated "now that doesnt answer my question, does it? lol, I said I guess not, sorry, I was visiting my folks!,lol Again she looked over my passport and greencard, taking her time, then stamped the boarding pass, and I was on my way.