FBI using morse code and smoke signals...
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According to the Daily News, some agents have had to use their personal e-mail accounts to do their official business. The FBI says it would like to be able to issue government e-mail access to all employees, but just doesn't have the money.
...sounds like Gmail could have a look into this issue and send out some invites. (Google will surely bring out a Beta-FBI mailing system after they have conquered Mars)
There