Doing Swabs News Today

However, a trained investigator will be able to sort out that, and then the most -- the crucial point is going to be the ability to do a forensic analysis through doing swabs, looking for trace evidence of explosive residue. >> and what they could find trace evidence of explosive residue on the pieces of the plane that theyre collecting now, right? >> well, they could, yes. and they should be preserving it for that type of examination. >> as the investigation goes on, how do you think theyll be ...