I am on H4 visa. My grand father is 85 years old and grand mother is 81 years old. I do not have any blood relative or other relative in USA. They are alone in India. They do not have any serious illness or diseas. My grand father was deputy collector and now he is a pensioner. Means they have fixed source of income; however, I and my husband wish to sponsor their visa. They have all required documents. I want to call them for couple of months. What can I do for the same? How to start the procedure? Please please advise me for the same.