communications. and so his defense, when he is contradicting mihis testimony before congress, in his emails, his defense is going to have to be, yes, i m a liar, but i was lying in my emails to my friends and my associates, i wasn t lying to congress. it is never an appealing defense in a perjury case when your defense is, well, yeah, i m a great big liar, but i was lying on other occasions. this is a strong case for the prosecution. glenn kirschner, ken delanian, thanks. u.s. prosecutors say the saudis were using twitter to silence their critics. the latest twist in the game mu of risk with social media next. sometimes, the pressures of today s world can make it tough