A NYT article Drone Pilots Are Shown to Have Stress Disorders, which refers to a new DoD report:
In the first study of its kind, researchers with the Defense Department have found that pilots of drone aircraft experience mental health problems like depression, anxiety and post-traumatic stress at the same rate as pilots of manned aircraft who are deployed to Iraq or Afghanistan. The study affirms a growing body of research finding health hazards even for those piloting machines from bases far from actual combat zones.
Note the DoD report is not readily found, that maybe because it is due to presented at a conference this week.

Link to NYT article:http://www.nytimes.com/2013/02/23/us...it_th_20130223