Comment what about pigeons?! (Score 2, Interesting) 209
Didn't the french have a problem with this in Paris with La Grande Arche de la Defense? They couldn't figure out why their laser, from one side of the building to the other, would lose connectivity at random times durnig the day. Turns out the pigeons were flying through the beam and interrupting service. I guess the only way around that would be to build a massive network of glass tubes all over the city.