My parents got US visa(B2) mutliple entries valid from 08/22/05 to 08/21/06, and they came to us in 09/20/05, we extended their visa in 03/06, so their 1-94 is good through 09/19/06. I would like to bring them to visit Canada in the end of Aug(08/27/06, i can not change this date), I know they need canada visa in order to enter Canada, but can they safely back to US side with their I-94?
Thanks!!!