let s just recap the extent of the attack. at its peak on tuesday all ofjbs s beef processing plants in the us were taken offline. the company said it suspended its affected it systems as soon as as the attack was detected rendering the nine plants unoperational. just to give you a sense of the scale ofjbs beef these nine plants alone process one quarter of all of america s beef. susan landau is professor of cybersecurity and policy at tufts university and she joins us now from amherst, masachussetts. you might not instantly think of beef processing as critical infrastructure and one could see the appeal of attacking any big company that has deep pockets and were for somewhere. but they are targeting very specific sectors here, aren t they? i very specific sectors here, aren t the ? ~ f . they? i think they re being