so the origins of thecrisrb, t residentialal segregation, poverty, of violence, there are two things i want you to thinkt historical. but i didn't lecture on this but something we have to keep in mind, there are also people who are living in these communities who are dealing with these types of issues, these social issues, as social issues on an everyday basis. and that's in some ways this is the backdrop that creates the world that we'll see for the rest of this semester when we watch david simons and the hbo series "the wire." i'd ask you if you had questions but we're out of time. so we can do questions on friday. [ applause ] >> i'll be in my office toda from now until later. >> lectures in history airs each saturday at 8:00 p.m. and midnight eastern and sundays at 1:00 p.m. we feature classroom lech kaczynski turs on different topics of american history. to keep wake-up american history tv during the week, or to send us questions and comments follow us on twitter, we'r we're @twitter.com/c-span history. >> there is a new website for american history tv where you can find our sch