Some officials remain convinced Russia is involved, but so far there is no evidence pointing to a particular adversary and no one has detected microwaves or other possible weapons.
Author: Julian E. Barnes and Adam Goldman
C.I.A. Admits to Losing Informants
Counterintelligence officials said in a top secret cable to all stations and bases around the world that too many of the people it recruits from other countries to spy for the U.S. are being lost.