minneapolis in two thousand and seven at the height of rush hour a bridge over the mississippi river collapsed taking more than one hundred vehicles and a construction crew down with it the tragedy was a wake up call about the safety of infrastructure. structures must withstand the decreed ation. the load when whether or snow every day. in the damage is not apparent or it s difficult to assess. blaney hard to see of this with federal institute of technology in zurich is searching for solutions buildings are even bringing organisms about reacting evolve with their environment and what we would like to do with our sensor network is us actually install an ironic system which conveys information on the health of this building. this new building at the institute has been outfitted with more than one hundred sensors they measure force