That's probably the hardest question to answer nowadays for me when crossing the border. My life and my job are pretty intricately mixed nowadays, that it's often hard to differentiate between the two. For example, when I went to WordCamp San Francisco, I was asked that question by the border agent. The conference I was attending definitely interested me on a personal level, especially since I have a personal blog, but clearly I can extract some business value out of it as well. So is it a business trip, or one for pleasure? The problem with going down the business line is sometimes the border ...