this happen? martha: terms of the effort to track him down and we are learning so much tonight about the cell phone, site gathering information that they had, tracking the batteries online. really it sounds like some really extraordinary police work. i think yeah. i have seen a lot of the cases. you and i talked about the bopston bombing way back boston bombing way back when. it didn t work well in that case. this is one of the best law enforcement i have seen at the federal state local level. this asian battery was in all the devices. that is how we knew it was the same bomber attached to the bombs. in addition we had good technology that leaves digital footprints wherever you go with the phone such as that we were able to track the bomber. the final fatal mistake he made was to walk in to the fedex office where we got surveillance video of him. he walked out, got in a red mazda truck which we had leads previously had been at the scene of other bombing sites. we got the license