The way snopes wrote the email, it’s as if the person inquiring about this did so at the earliest, october 12 (since that date is in the email).
Snopes went to work pretty quickly to post this October 15 (as google dates it)
Additional story at the Daily Mail. (the below dates, because it’s just the Govt.’s story, aren’t verifiable reall)
“investigating” Giardina supposedly in July 16th
Strategic Command didn’t announce Sept. 3rd Suspension
Omaha Herald reports suspension Sept 28th
http://www.omaha.com/article/20130928/NEWS/130928773
Daily Mail Article, Sept. 28th
http://www.dailymail.co.uk/news/article-2436621/Second-command-countrys-nuclear-arsenal-suspended-investigated-GAMBLING.html
Iowa not to prosecute for fake chips, October 1, 2013
http://www.omaha.com/article/20131001/NEWS/131009905/1201
Supposedly he was “scheduled to be retired at the end of the year”.