The Brussels City Center responsibles decided to launch a campaign to reassure tourists and boost the image of the city.
Somebody had a very original idea ! If you want to be absolutely sure that no terrorist will bother you, just look for the site, Call Brussels. The Brussels inhabitants themselves will reassure the visitors !
Phone booths have been installed in three strategic locations of the city.

If you hear such a phone in a booth ringing, everybody can respond to questions from foreign tourists.
I should take a chair with me and sit besides one !