CNN Piers Morgan Live April 16, 2013 01:16:00
That. but the investigation will proceed. they will look at the forensics at some of these recovered devices and they may be able to see the signature of the explosives, are they similar to the type of bombs used by say al qaeda or other groups. that may start to provide some answers. >> i heard you say earlier the fact these weren't big devices would perhaps suggest it isn't an al qaeda operation, that they would go for a more dramatic impact with the devices. also, there are these ball bearings we now know have been used. any significance to that? >> well, you know, piers, here in new york, ...
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