revenue come from the crude oil sales. they are trying do you think the sanctions have a chance of altering tehran's nuclear behavior? >> no. they may increase the cost for iran to do business internationally. that's a good thing. i certainly support that but as long as countries like russia and china are prepared to assist iran in evading international sanctions, china is a huge purchaser of iranian oil, ultimately the sanctions will not have a significant effect. gregg: if iran tried to shut down the strait of hormuz would it lose critical support from china and russia or are they always going to support iran no matter what? >> that is why i think this is mostly bluff on iran's part because neither china nor russia really want to see that kind of disruption. from russia's point of view the higher price goes internationally as oil exporting country the more they benefit too. gregg: would armed confrontation or even threat of it spike oil prices and