thanks. iran says it s planning to speed up the effort to enrich uranium that could be used for nuclear bomb. they informeed the-up atom olympic agency it will install high-tech centrifuges at the main nuclear site. it s believed they are five times faster than the current models. let s pull back a big and look at th big picture of the middle east. tonight correspondent jim rosen walks through the challenges that america faces in the dangerous neighborhood. with the russians now predicting the imminent downfall of assad regime in syria and the egyptian military warning of the collapse of the morsi islamic government in cairo, never has the middle east been volatile or vexing for the policy rangers. range of challenges on the administration. do you think we should make