On Wednesday in the subway our Deputy German coordinator Bernhard made this nice picture in the subway.
Bernhard Reiter, CC-By.
This add was visible in the whole subway. The translation of the text on the left side:
Free Software - News at LinuxTag - Under the slogan "Linux is worth it", Linuxtag -- the leading congress around the free operating system -- started in Berlin. Until Saturday, they expect more than 10,000 visitors.