Crews rushing to the wreckage of four Spanish commuter trains knew from the smell of the smoke that this terrorist attack was different. Police with long experience responding to attacks by the Basque terrorist group ETA had come to expect a certain type of explosive, with a certain smell. But the Goma 2 Eco dynamite used to bomb the Madrid trains March 11 gave off a different odor, the first sign that Spain was dealing with a new and more deadly terrorist attack. With 191 dead and more than 1,800 wounded, it was the worst such attack in Spanish history. Full Story
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