I recently submitted my DS-260 and went over it with a fine-tooth comb about 20 times. Everything is correct, but today I remembered that we transited through a country on one of our flights to the US in 2017 (left the airport and stayed overnight at a hotel before getting back on the plane) and I completely forgot to add it to my countries visited in the last 5 years. Is this something worth unlocking the DS-260 for or should I just flag it at the interview? By the interview stage it will likely be outside the 5 year time frame anyway as the brief visit was in September 2017.