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Welcome back to week ends with alex witt. the president of tunisia has declared a state of emergency one week after the beach resort terror attack that killed nearly 40 tourists. state media says it will give the army more authority and restrict the right of public assembly. tunisia last declared a state of emergency during the arab spring protest that brought down leader ben ali. officials are on heightened alert for potential terror threats. this is in response to an isis call making ramadan a month of terror. police are increasing patrols and asking the public to stay alert. joining me no...

Week we have ramadan. we have the anniversary of isis declaring a caliphate. we have the u.s. celebrating freedom. how concerned should we be about the symbolism of all this? >> there is a degree of symbolism symbolism. isis has been trying to attack people since september. they said "you should kill the unbeliever wherever you find them" and it's given enthusiastic supporters to attack people. we've seen attacks in ottawa sydney, paris, copenhagen last week in france. so there may be an attempt to exploit that symbolism but the threat is more or less constant. i don't think it's necessarily a...

nuclear talks. negotiators have reached a tentative agreement on some of the sanctions for iran. one of the stickiest issues to be resolved before a final deal is struck. the deadline is now just three days away and joining me now from the talks in vienna is nbc news chief foreign affairs correspondent andrewa mitchell hello, andrea. >> hi, alex. on this a holiday weekend back home, technical experts are working round the clock in vienna. their narrowing their differences, they have reached tentative agreement on two out of the three main issues involving sanctions. they've reached t...

the ppp is much more than a free trade agreement. it is part of a global race to the bottom. i think it's time we slowed down the fast track. >> once the skids are greesased, it lasts in to the next president and potentially even the president after that. >> and the house has just voted to give president obama what is called fast track authority. the rules of the road in the global economy, they're being written right now. the question is who will write them. >> we were kind of feeling bad that we hadn't rubber stamped anything for this president, and this is it. >> only said from a ...

Do have especially from the west is we have other sources of intelligence which we can generate. sure there will be some loss in it but i think it's worth it because the decrease in propaganda value. i don't see why we need to keep this open unless you're just a researcher like myself who wants to stud te group online. governments have a lot of other capabilities they can use. >> good to hear. peter neumann and clint watts, thank you. the trial of aaron hernandez. find out why he was laughing during witness testimony. we'll take you live to the courthouse.