rick: hello, everybody, happy 4th of july. thanks for spending part of it with us. a brand new effort to salvage diplomacy and salvage a nuclear stand you have a. i m rick folbaum in for jon scott. i m arthel neville in for jenna lee talks this week are intended to clarify aspects of tehran s nuclear energy work and set the stage for political negotiations. tensions are high since high level talks stalled in june with iran now saying it successfully tested missiles capable of hitting israel as extended economic sanctions went into effect over the country s nuke program. the european union imposing an embargo on iranian crude oil. and washington introducing other measures as deep differences remain over the nature of iran s nuclear work. national security correspondent jennifer griffin live in washington. jennifer, the complexities run abound. reporter: well, arthel, it is interesting. this is the third straight day iran has been carrying out tests, war games in the region