high-ranking former pentagon official. the justice department is investigating retired marine general james cartwright, former vice chairman of the joint chiefs of staff. let's go live straight to the pentagon where barbara starr has details on this. shock to many when they read this, barbara. >> absolutely, good morning, kate. jaw-dropper even for the pentagon. james cartwright when he served as the number two until 2011 was a close adviser to president obama, an expert in nuclear weapons and cyber warfare, a brilliant mind, now under investigation by the justice department. source telling me it is for material that appeared in a book written by "new york times" journalist david sanger called "confront and conceal" about iran's nuclear program. cartwright potentially leaking information of the computer