The Navy and Marine Corps must complete servicewide reviews of the security measures that protect troops and their families.
Maj. Jason Brezler, a Marine reservist, has been fighting a recommendation for separation since 2013.
The incident is under investigation, according to the Department of Defense.
The Army recently awarded six 4th Infantry Division soldiers with combat awards for responding to an Oct. 18 insider attack...
Continuing the advise-and-assist mission in Afghanistan was the best way to honor their fallen comrades, he said.
The bullet tore a large hole in the ballistic material, but the Enhanced Combat Helmet (ECH) stopped the round.
The training -- continuously revised in response to events overseas -- emphasizes security, vigilance and marksmanship.
The U.S.-led coalition in Afghanistan faces an overall deterioration of the military and a political situation.
Maj. Brent Taylor, killed Nov. 3 by an insider attack, had been the mayor of North Ogden, Utah, since 2013.
This comes just four days after another insider attack left an Afghan police chief dead and an American general wounded.