This is a very common problem nowadays. The Homeland Security seems to be taking an activist role at certain airports. I have heard many horror stories from my clients. Thankfully, the CIS seems much kinder and will often grant extensions, at least for the cases I have handled at my office. We submit an extension request with proper evidence, and hopefully they approve the requested extension.
Answered on Oct 08th, 2014 at 8:27 AM