"On June 10, 2013, USCIS updated the section of the USCIS Policy Manual regarding time spent abroad by interpreters and translators employed by or under contract with the Chief of Mission or U.S. armed forces.
Previous policy allowed individuals employed abroad as interpreters or translators in Iraq or Afghanistan by, or under contract with, the Chief of Mission or U.S. armed forces to treat time abroad as residence in the United States for purposes of naturalization.
This policy was amended by adding certain security-related positions as types of qualifying employment. In addition, the physical presence requirement is now covered and employment is no longer required to have taken place in Iraq or Afghanistan." - USCIS, June 10, 2013.