So sorry, tourist visa for the USA is impossible, even I can't get one for my family because we have to have so much wealth in Cambodia first. If it were up to me, everyone could go wherever they want to go because nothing is more human than walking, traveling, seeing new places, but we silly humans have carved the Earth up with our imaginary borders.
We are just about to give up on our immigration visa after 5 years, now the US Embassy here won't even communicate with us anymore despite being eligible for an interview.