there are a lot of moving parts and a lot of people working together. >> i would agree. >> i mean, we have been trying to find, has there been national data? how do we prove this as one specific piece for collaboration? i think again, lieutenant, thank you for those words. there are effectiveness. but there's a clear link that this is the safest strategy. it's a work in progress. i am appreciative of ways to come up with data measures so we can say, definitively. this plays in the whole scheme the violence reduction >> i mean, i just want to be clear. it's not impossible. it's difficult and it takes time and resources. if we had the available resources to do an indepth study. it's a serious under taking. >> i followed up that. you know what. it's take it even further. let me say this. it isn't rocket science. may be we don't need the data. >> i can think where crn's have helped. they have been able to put aside emotions. you can call me ernie. i don't call him chief. getting back to the gun buy back. i think we are right in line. we are doing the same buy back. we could use more. i think if you were to talk about gun violence. in 2006. we

has been completely abused it shows that there is no effective. as far as you know i don't nations it should be a listen to us every toy that small data is given. military and intelligence but. it is a slippery slope that leads to the takeover of countries all understand. another country that suffered months of civil unrest as yemen and its president announced on saturday that he is to step down in the coming days it follows nine months of violent protests with the opposition demanding an end to ali abdullah saleh is thirty three year rule but president of the arab lawyers association told me he believes sellers assurance that he will step down is nothing but an empty promise. he must have made a hundred. speeches and in every single one of them he said he is going to leave in every single one of them he promised that he doesn't want to run as a president and every single one after he finished he stayed in power this is absolutely no different from anything before i think no one believes what he is saying he had the. time to in his life when he went to saudi arabia and exist policy. organized with the gulf states so that he stays away and then

has been earned. the nation's economic and social future is riding on it. i'm jamie merisotis. >> tom: you can follow nbr anytime-- we're online at nbronpbs.org. there, you'll find all the mart data from the program. you can also follow us on twitter @bzrpt, or my personal feed, @hudsonnbr. if tweeting isn't your thing, friend us on facebook at bzrpt. >> susie: finally, a big gamble by dc comics has paid off in a big way. the company rebooted its entire line of superhero titles last month, and the result has been huge. five million copies of its new comics have been sold since then, the highest sales numbers in more than 20 years. the most popular titles include "justice league," "superman," and "wonder woman." and that doesn't include digital copies viewable on tablets like apple's ipad. tom, along with new costumes and new stories, new technology like those tablets and smart phones are luring both new and lapsed comic fans. >> tom: you don't want to put the silly putty on the ipad for the comic to get that to peel off. doesn't work that way. still need the old school comic book for that. >> susie: only you would know that, tom. >> susie: that's "nightly business report" for thu