CNN The Lead With Jake Tapper January 7, 2015 21:14:00
More sophisticated and these are all quite low tech and the reality is no matter how good our intelligence may be or the european intelligence may be it's hard to detect these low-tech attacks and prevent them. we'll have to step up our game and for the french this is not just an issue of keeping track of the hundreds of french who joined the fight, but the many thousands of europeans that have joined the fight that can come back to france with very easy travel in europe. >> very open borders there. how concerned are u.s. officials about either a related attack in the united states or a possib...