Detailed text transcripts for TV channel - CNN - 20100413:17:59:00
And now im going to hide this backpack full of smokeless powder right here. a minute later, rangers still in the early stages of training tracks the explosive scent right to the source. >> theres certain chefs that will smell a pot of stew and say its oregano, the dog walks into it and says, oh, thats c-4. >> reporter: the u.s. capitol police are just starting to use vapor wake dogs. they are using them at sporting events and other large gatherings, but amtrak has embraced them despite the $20,0...
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