The purpose of this modification is to advise interested vendors on a change in the email address associated with this RFI. The revised email address is [email protected]. Please note, emails sent to the previous email address were not received. All previous inquiries should be resubmitted to the correct email address. Due to this change, the dates for questions and reponses to this RFI have changed. Questions should be sent no later than 4:30 P.M. (U.S. Eastern Standard Time) on November 30, 2011. Responses to this RFI are requested no later than 4:30 P.M. (U.S. Eastern Standard Time) on December 14, 2011. The revised e-mail address can be found in Sections 5.2 and 7.2 of the attached RFI Document.