Hi, I have a question regarding my mother and father-in-law in South Korea. They overstayed a visitor visa in the 1990s, left and tried to return to the US and imposed a 10 year ban. That 10 years was completed last year. They tried to reapply for a B2 visitor visa yesterday and were denied. They are elderly now, all of their grandchildren are here in the US, and they don't have a criminal past. Is there anything that can be done now? Is there some sort of special waiver or form that needs to be completed? Thank you.