Link to YouTube video of interview. The mother of State Department official Sean Smith, who was killed September 11, 2012 in the terrorist attack on the American consulate in Benghazi, Libya, appeared on CNN this evening.Here's the computer generated rush transcript: SNIPCOOPER : we're talking tonight with pat smith whose son sean smith was killed in the benghazi attack. today his son asked mitt romney to stop invoking her son's name on the campaign trail. pat smith did not speak about anyone's political agenda tonight. she is, however, bitter ly disappointed with the search for answers.who told you that they...