As we approach the 20th anniversary of the 9/11 attacks, it’s natural to take a look at what has changed in the years since. Those horrific moments when we all watched the twin towers of the World Trade Center collapse live on TV were particularly scarring. You have to wonder how safe such tall buildings really are, because those towers were a model of safe architecture in their day. It might be reassuring to know that we’ve come a long way in both design and materials since the World Trade Center was designed in the 1960s, and especially in the past twenty years since they fell. -via Digg
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