The Central Intelligence Agency will make one of the biggest overhauls in its nearly 70-year history, aimed in part at sharpening its focus on cyberoperations and incorporating digital innovations, Director John Brennan says.

Brennan told reporters he is creating new units within the CIA, called "mission centers," intended to concentrate the agency's focus on specific challenges or geographic areas, such as weapons proliferation or Africa.

He also is establishing a new Directorate of Digital Innovation to lead efforts to track and take advantage of advances in cybertechnology to gather intelligence.