Here's how engineers salvaged Italy's massive shipwreck

Yesterday, engineers successfully led one of the largest salvage operations in history on the shipwrecked Costa Concordia, which smashed into a small Italian island twenty months ago. Workers were able to right the ship in roughly 19 hours. This graphic shows how they did it, and how they'll float it away. » 9/17/13 10:40am 9/17/13 10:40am