firearms expert chris henderson examined the knurls on the fatal bullets. urls are the ridge-like protrusions that hold the lubrication needed to fire them. henderson then compared those knurls with the knurls on the bullets in shannon touchet's bag. >> we had the same number of knurls, same width, and those knurls looked kind of like railroad tracks going around the outer surface of that bullet. all the physical characteristics, everything that we could physically see and measure were indistinguishable from one another. we could not tell the difference between one and the other. >> police brought shannon touchet in for questioning. he insisted he knew nothing about ron shaw's murder. he said he was with his girlfriend that night. >> she did verify his alibi and stated that shannon touchet was, in fact, with her in lake charles. >> but looking at shannon's shoes, investigators noticed he was wearing nike air jordan basketball shoes, similar to the shoe impressions at the crime scene. scientists took casts of shannon's shoes and compared them to the cast from

i think chris henderson with 3d robotics did a great job of going from crisping editor and founder of wired to 3d robotics, and making drones something that are not seen as, you know, terrible things, but actual tools and technologies that cap help us as we move forward. single board computers, as markus said. >> there's a whole host of things. baby blankets. a woman in detroit. she worked with cart heart to get excess material to make sleeping bag coats for the winter, to, you name it, there's ut. >> it's endless. >> with the rise in innovation that can result, what is the future of america look like. we'll have more on that when we come back. >> welcome back. we are talking about the rise of do it yourself culture, and what it means for the future of innovation. how do you think it will impact the quality of the products entering the marketplace. will we see a rise in the sophistication of things created operations? >> absolutely. and i would say not only sophistication, but last year there was - the first maker fair, and i have to say there were 35,000 attendees. we saw design taki

i think chris henderson with 3d robotics did a great job of going from crisping editor and founder of wired to 3d robotics, and making drones something that are not seen as, you know, terrible things, but actual tools and technologies that cap help us as we move forward. single board computers, as markus said. >> there's a whole host of things. baby blankets. a woman in detroit. she worked with cart heart to get excess material to make sleeping bag coats for the winter, to, you name it, there's ut. >> it's endless. >> with the rise in innovation that can result, what is the future of america look like. we'll have more on that when we come back. vé >> welcome back. we are talking about the rise of do it yourself culture, and what it means for the future of innovation. how do you think it will impact the quality of the products entering the marketplace. will we see a rise in the sophistication of things created operations? >> absolutely. and i would say not only sophistication, but last year there was - the first maker fair, and i have to say there were 35,000 attendees. we saw design t

chris ill lizza, manager of post politics.com. nbc political reporter kasie hunt. "washington post" report nia-malika henderson and steve kornacki, host of "up." this is what we call a monster panel. thanks for joining me. i'm going to start with you, chris. you said something i just loved. you said cochran pitched a political perfect game. how did he do it? what did you mean? >> if you looked three weeks ago yesterday, there is no one who spends time following politics who is not being paid by thad cochran who would say thad cochran is going to win. he had been in the senate, kristen, for 36 years and got less votes, as you pointed out, than chris mcdaniel did. if on june 30 he got less votes, why would he possibly get more on june 24th. we would assume everybody sort of knew who he was. what he did was expand the electorate. he did that i think most notably among the black community, someone who works for me, phillip, a really bright guy, i want to make this point because it's really important. in the areas where the african-american population is up, it went up 40%. in every other county, it went up 16%. th

by last night henderson was tweeting me that the nra had reached out to his group to say, "sorry" and, sure enough, according to christ the full page criticism came from one person and does not reflect the thoughts of the nra as a whole. the truth is an alert went out that referred to this type of behavior as weird or somehow not normal and that was a mistake. it shouldn't have happened. i've had a discussion with the staffer who wrote that piece and expressed his personal opinion. our job is not to criticize the lawful behavior of fellow gun owners. >> after that interview open carry texas went back on to facebook to thank the nra for its obedience saying open carry texas would like to both thank and applaud chris cox and the nashville rifle association for clarification on their stance of open carry. game, set, match. well, while the nra may have cracked down on dissension within its own ranks gun control groups continue to set their sights in another direction. after successfully lobbying several fast food chains to establish antiopen carry policies the group moms demand action is ramping up the pressure on target