It will take a lot of iron chains and money to keep your heavy concrete dome from collapsing. Besides, there's an easier -- and less risky -- way to build a dome this tall today. Try again!

Vale SA, the world’s largest iron ore miner, on Tuesday vowed to take as much as 10% of its ore output offline in order to decommission ten more dams like the one that burst last week ...

The concrete is damaged in many places, exposing the iron framework beneath ... submerged due to the construction of a hydroelectric dam, after which the bridge was no longer used in 1955.