including a missile expert at this test facility which mysteriously blew up last november. iran blamed israel and the united states. i want to categorically deny any united states involvement in any kind of act of violence inside iran. reporter: israel has never officially said it is behind these killings but former intelligence officials have clearly expressed satisfaction. everything should be a full scale war. reporter: james bond style attack comes amid enormous growing tensions over iran s nuclear program. last month, washington approved strict sanctions against iran already its currency has dropped 20%. iran called it an act of war. responding with a show of force, test firing missiles, a sign to back off and iran threatened to close the oil corridor, the