. >>> next week on lectures in history, columbia university professor nathaniel persily looks at the matter of redistricting. join us each saturday at 8:00 p.m. and midnight eastern and sunday at 1:00 p.m. for lecture as i cross the country on different topics in american history. lectures in history are also available as podcasts. visit our website at c-span.org/history/podcasts or download them from itunes. >>> this year c-span's local content vehicles are traveling the country, exploring american history. next, a look at our recent visit to wichita, kansas. you're watching american history tv all weekend every weekend on c-span 3. >> we're flying overdowntown wichita, the air capital of the world. our mission is to preserve and present kansas aviation heritage with a real focus on wichita aviation heritage. you look at the history of aviation, from basically the wright brothers, moving forward to today. about 70% of all general aviation aircraft have been constructed in wichita. that's a huge number when you think about the msa or the population of wichita being about half a milli