{HEAD ~ The beads} may be added to substances such as explosives in order to create a distinctive optical signature that identifies a manufacturer, lot number, etc. in {TAIL ~ the event} of the need for forensic analysis 
{ HEAD ~ The beads } may be added to substances such as explosives in order to create a distinctive optical signature that identifies a manufacturer , lot number , etc . in { TAIL ~ the event } of the need for forensic analysis
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH