several cities are stepping up security. in new york city the nypd out in full force with officers standing guard and setting up checkpoints in every corner. cook county, in chicago, bringing out bomb-sniffing dogs to help patrol areas of large crowds like union station. los angeles, the l.a. pd now focusing their efforts on city rails and airports. mood of remembrance resonating all around the nation. molly henneberg is live in washington. what new info do you have. molly: we are just getting new information and from jennifer griffin, our pentagon correspondent who has spoken to a senior official who is involved in intelligence briefings today. this official is telling jennifer griffin this plot is seemingly, quote, less and less credible. it appears to be possibly, quote