allowing investigators to investigate trends and pursue criminal prosecutions. >> if a scientist at a tdac find a latent print inside an ied, it will be searched against databases and someone could be identified. >> some cases never seem finished. like a bizarre 2003 plot that killed alleged coconspirator. a bomb around his neck. >> that will stick in my memory forever because it took seven years. it was a bank robbery plot by a sociopath. there was one piece out of hundreds that looked to me like it was probably part of the bomb, like not 100% sure. speak up with the fbi in huntsv, alabama, catherine herridge, fox news. ♪ >> shannon: russia flexes of military muscle. that story leads where in the world. russia's defenseman to terry announcing what it calls the largest military drills of 1981, during the soviet era. china also sending more than 3,000 troops to participate with