mr. carlson claims the traditional family unit was a pillar of america's national identity and move away from that component diminishes american culture. history bookshelf airs every saturday at noon eastern. >>> recently, american history tv and c-span's local content vehicles visited shreveport, louisiana, to showcase its history and literary culture founded in 1836, shreveport has a population of about 200,000 people and is located about 250 miles northwest of baton rouge. barksdale air force base is home to the b-52 bomber. since the b-52's introduction here in 1958, the base has housed one of the largest fleets of this aircraft in the u.s. military. >> you know when a b-52 enters a conflict when the decision maker -- america's leadership, they're serious. and it just got serious when the b-52 entered the conflict. b-52 says massive air power. >> it was the first nuclear bomber and designed during the cold war era and was to project global power and long-range strike to our enemies during that era. now, that has graduated over the years and this weapon system has also been modernized

mr. carlson is way off base and behind the breitbart crap we had to deal with in the past.his smacks to the problem in the whole. these folks are engaged in trying to distract us from pursuing justice for trayvon martin. institutional racism is important to consider when we look at the ways he was profiled by mr. zimmerman and the ways the sanford police department historically operated and handled this particular case, we have to ask big questions about institutions. they can accuse me of being a racist and us as being race baiters as much as we want to, we will still pursue the case and this issue. >> dr. james peterson, thanks for being with us. thanks so much. the law at the heart of the trayvon martin investigation, stand your ground, brought to you by the nra. that's next. hello! who's she? downy unstopables. here to shake up your fresh. toss these little scent boosters in before you wash. and the fresh scent will last until you're ready to wash again. downy unstopables. the fresh too feisty to quit. to put more giddy-up in our get-along. it's time to start gellin' wi