I was reviewing my application today (had aplied back in November) and realized I made the most obvious mistake. I am a permanent resident in the US and the UK national (moved to the US 4 years ago). And I did visit a country or two from the "questionable" list (Lebanon, Turkey, Russia). As I was going through the list of countries I visited in the past 10 years it descended on me I did not mention the UK (duh, I know). From what I read here omitting a country or two doesn't seem to cause an issue or delay in processing, but mine being so obvious, could they deny my application based on that?