intelligence correspondent catherine herridge is here this morning. >> reporter: they are putting the administration iraq strategy under the microscope. three key factors are at play. the damning report from the international atomic energy agency that iran continues to advance the nuclear weapons program. the plan to assassinate the envoy to washington, d.c. and the attacks this week on british embassy in tehran. the specifically the iran issued explained why he believes the new tougher financial sanctions on the iranian central bank cut off iran from the u.s., canadian and british economies. >> iran is cut off entirely from three of the world's largest financial sectors. and our efforts are paying off. iran is now facing unprecedented levels of financial and commercial isolation. >> reporter: a top state department official on the issue hinted strongly iran's crude oil sales are next. >> sanctions are also more effective when they are