have been something we may not have learned about but because of what happened in boston everybody is on higher alert? >> i remember vividly i got sworn in on october 8th by then there had been several anthrax attacks and several thereafter. one of the first problems we had was the fact the field tests were inferior and a lot of false positives. horrible hoaxes. i would like to think in intervening ten years the fields tests and it seems from what i heard that field tests that said envelopes contained ricin were confirmed and they'll confirm at a higher level of scientific inquiry. that modest improvement is a significant change in how we deal with incidents like this. just better field tests. >> we know that there's been a debate inside law enforcement community moving out of the boston investigation about when to release these pictures in public. and there are some who believe the public could be helpful in