I studied in Vladimir, Russia last semester, and I had a personal tutor, Svetlana, who I became very close friends with. Since leaving, we've been talking a lot on Skype, and I really would love to see her again, so I suggested that she come visit me in Chicago during our winter breaks sometime in January. She's thrilled with the idea but has never left Russia and is worried about the process of getting of a visa. I know visas to the US are difficult to get, and I read that I could sponsor her to help increase her chances of obtaining one. Is this a good idea? What can I do to help her?