NVC schedule my dad his interview in July 13, 2016 but because of his medical condition i have to re-schedule his interview in August 22, 2016. during his interview the consul ask his new NBI CLEARANCE my dad comply it the same day and mailed it by 2go. US Embassy received the document they ask from my dad. by August 26, 2016 visa was issued. by September 1, 2016 my dad received his visa. a very stressful process & pocket fever is now over. my dad will be here in the states soon.