The role of the pilot has changed hugely in the last sixty years of military aviation. Jet pilots in the 1960s, flying types such as the Harrier and F-102, would have spent a huge portion of their concentration just keeping the aircraft under control. That left little spare mental capacity to locate and engage the enemy. Today, the opposite is true. Computers have made flying so simple that it is now considered very easy to fly the SAAB Gripen or Lockheed Martin F-35 Lightning II, allowing the pilot to focus fully on his or her mission.