delivery system for that bomb which also take as great deal of time and technology, when asked if he disagreed with that view that iran could go nuclear in a year james clapper said this. >> no, sir. i don't disagree. and particularly with respect to the year that's, i think, technically feasible. but practically not likely. >> when pressed for more detail about how far iran was progressed in iranian enrichment, clapper said that is better left for a closed door session, shep. >> shepard: we have been hearing this stuff for long time. we have been hearing how israel might be ready to attack iran. it's my understanding that came up in this briefing today as well. >> indeed, it did. general best of your knowledges said to the best of our knowledge israel has not decided to attack iran. clapper said that international and u.s. sanctions against iran are beginning to work as evidenced by iran's recent devaluation of its currency.