the week begins with a look at military history, with max hastings, and his book, vietnam, an epic tragedy, 1945 to 1975. and that is followed by kneel basscouple's, the escape artists and mary mcconaughey the tango war. monday night at 8:00 eastern on c-span 2. >>> when we study the history of memphis, tennessee, there is pre, april 4, 1968 and there was post april 4, 1968. >> you know, memphis was the place of a lot of racial tension, but it was also the place of a lot of racial harmony. >> had there been no cotton economy, that might not have been a need for a transportation hub. so it is quite possible that without cotton, memphis would not exist in the 21st century. >> this weekend, c-span cities tour takes you to memphis, tennessee, with the help of our comcast cable partners. beginning saturday at 7:00 p.m. eastern, on book tv, author aaron talks about list book "down to the cross road, civil rights, black power and the merit of march against fear" and ar thou charles hughes on the role music plained through his book, country soul, making music and making race in the american south.