The directive creates a four-person counterintelligence agency under a director with broad authority to determine which U.S. counterintelligence secrets -- whether they be in the hands of the U.S. government or in the private sector -- need to be protected from potential adversaries.

CNN: Clinton creates new counterintelligence chief post

There are a number of things that our team has put in place to try to deal with some of these challenges -- some more counterintelligence measures, some closer cooperation with village elders who can vouch for the efforts of our allied forces there.

WHITEHOUSE: The White House

The U.S. military has tried to take action to prevent attacks by Afghan forces, appointing monitors to provide security for troops working with Afghans, boosting its counterintelligence infrastructure in Afghanistan, adopting an eight-step vetting process for Afghan recruits and revising the training they receive.

CNN: STORY HIGHLIGHTS