Documents required for visiting visa? I am a student.

Hi, I am a PhD student and will be graduating in December 2012. I want my parents and my brother in USA for my graduation ceremony.

  1. What all documents I need to send?

  2. I cannot show more than $2000 in my account. Will this be a problem?

  3. My dad’s occupation is agriculture, my mom is house wife and my brother did job for 2years after his graduation and now preparing for engineering services.

  4. How much property are my parents supposed to show?

Thank you so much for your time.