I was wondering if someone has experienced the following situation - has attended visa interview in Canada or Mexico with an old valid visa that is about to expire and received a 221g for the new application. In this case can you travel back to the U.S. using the old valid visa and wait until 221g has cleared? Any one has done this or know if it is possible? Please note that this question is not related to using AVR which is not possible to use after a visa interview. Thanks for any information you can provide.