. >> coming up on c-span2, white house adviser jon brennan talks about u.s.cut the terrorism efforts in yemen. andrew mccarthy at 1:10 a.m., and the head of the tsa discusses airline security at the meeting of the air line pilots association. >> this weekend on book tv after words. >> two guys in the dorm room. they cracked the code. it all just falls into place. you don't see the rest all playing on the side of the road to not having achieved success. >> and unintended consequences, former capitol partner edward canard looks at the market economy, the causes of the recession, and explains how lower tax rates lead to investment and economic growth saturday night at 10:00 eastern, part of book tv this weekend on c-span2. >> president obama's counter-terrorism adviser jon brennan defended the use of drone attacks in the yemen saying deport affiliated militants are a threat to the u.s. he bore marks on the council of foreign relations, jon brennan did not rule out u.s. involvement in syria and called on conflict -- congress to pass a cyber security bill. he serv