When i was younger i made a few silly mistakes and ended up getting locked up for a few years for concerned in the supply (class B).

I was released in 2006 and since then have had no issues at all with the police, now a job has came up that would require travel to USA. I see some people getting visa's with simple possession charges but i can't find anything about the concerned in the supply.

Would it be a simple refusal or if i went for an interview is there a possibility of getting one however small?