I am an U.S. Citizen, I am currently living in the u.s. I filed the I-130 petition for my Husband, He is not a u.s. citizen he currently in another country at the time. The case has been approved. They sent me an approval letter which is the I-797. They are now sending my file to the NVC. Whats is the next step in this process? Please help me on this, Thank you.