What should be the top priority for preventing insider threats in the military?

A senior U.S. Army soldier was arrested in England on suspicion of spying for Russia following a joint investigation by the FBI, U.S. military intelligence and British counterterrorism police. The unnamed 41-year-old had been working at Imjin Barracks, headquarters of NATO’s Allied Rapid Reaction Corps, and was allegedly entrusted with sensitive information, according to Brig. Gen. Sean Stinchon, commanding general of the U.S. Army Counterintelligence Command. British police said the investigation is ongoing, while Russia denied any connection to the soldier.