The CO was not friendly (at all) but she did nothing to be intimidating, just seemed like she was doing her work. She focused in the paperwork (barely looked at me during the interview). Her questions were: 1) How did you meet your fiance?, 2) When was the last time he visited you, 3) Does he speak Spanish?, 4? Do you have a valid US Visa?, finally she requested and went though all the pictures, bank statements, etc. I provided as proof of authentic relationship. The actual interview lasted no longer than 15 minutes. K-1 visa is approved!