Yet another instance of your tax dollars at work: immigration sends home a European security researcher attempting to teach a two-day course at Black Hat 2007 in Las Vegas.

On a similar note, a guy I know just recently tried to enter Poland with a visa that allowed transit through Poland, and he was denied entry because his intention was just to enter for an hour to meet some people for lunch. Apparently, it would have been okay if he spent a week "transiting" through the country, but just popping in and out for lunch is a no-no.

Meanwhile, other people were walking past the border without even having their identification checked or being stopped.