Afghanistan and head the sources that killed Osama Bin Laden. But first new details tonight, the white house said for the first time u. S. Air strikes will target isis leader shirp and how they will train troops. And today jim sciutto has more for us. And how specific are they . At this point they have not targeted leadership, but now they say it is not defensive, it is offensive. And they will target command and control and leaders and that is something weve seen as the u. S. Have done against al qaeda affiliates in somalia and other places with success. And you have information in your reporting about the huge increase we saw, at first they said 10,000 isis fighters and now the cia is saying up to 35,500. What do you know about the search . This is a product of the isis success. It has swept across syria and into iraq, it has apracted more attracted more fighters from overseas and they take over territory to con script local fighters, some of them forcibly and some of them voluntaril