( CNN ) -- Citing a continued improvement in the security climate in Saudi Arabia The last major terror strike in Saudi Arabia occurred in 2011 . An ` ` ongoing security threat '' persists , U.S. State Department says . Americans need to keep a ` ` low . ''
The last major terror strike in Saudi Arabia occurred in 2011 . An ` ` ongoing security threat '' persists , U.S. State Department says . Americans need to keep a ` ` low . ''