well you know there are a lot of asser as you mentioned before that there are you know of order a million or so asteroids large enough to destroy a major city out there but space is big so they're spread out few and far between so they don't basically don't hit each other very much at all but as you are correct that makes it a challenge to find them because they are you know like the i mentioned before the size that could be dangerous could be as small as a building and if you put that millions of miles away from the earth it can be quite difficult to detect and that's what we're all working towards is finding and tracking them but it is possible to say an asteroid is detected and we know it's had it towards earth and it's huge and will destroy the planet if it hits now you're saying we can stop it with spacecraft sense to bump the rock from its past so it misses our planet so this kind of spacecraft already developed first off we should we have to talk about the size of the asteroid first if it's something that's going to be enough to say kill off everyone on earth then it's going to be

asser for as international criticism, the u.s. has not taken kindly to that. saying you should be concerned with our own violence in your own streets. gun violence and et cetera. here is one big difference noted by a well-known iran analyst, in 2009 when the election protests took place, just about a million people in iran had smartphones. i was there and social media played a big part in organizing, getting witness accounts out. today 48 million iranians have smartphones. access to the internet. and that means they don't watch the state media, they can find out what's happening on their own. >> the regime is trying to block some of those opportunities to get that social media -- >> exactly. >> they're trying to block some of those sites. all right. thanks very much, jim sciutto, reporting for us. we're back with democratic senator chris coons of the foreign relations committee. so, senator, should president trump offer his opinion on the arrest in iran so publicly? he's been tweeting almost every day about it. or is he simply giving fuel to iranian hard-liner

asser, whenr.k at the different listings and the pros and cons, will it be less attractive for foreign investors investing in saudi aramco? amin: a lot of things will happen when we do the show. -- a lot ofco investors will be interested in aramco regardless of the decision. a lot of information that will withared, and this is -- all of that information, we will be confident. there is a performance in the environmental performance of the company in the safety and the technology, so we are not concerned about the impact on we areramco because confident that the company performance and all of that will attract a lot of attention. guy: that was the saudi aramco ceo speaking to francine lacqua and davos about the companies upcoming ipo plans and where that ipo will ultimately take the business both locally -- that looks like a certainty -- plus internationally. a couple of swiss stocks i want to mention on the move this morning on miami are our screen -- our mrr screen. baked goods abandoning guidance.