] E-mail is a great tool of communication but sometimes
] just a click of the send button can spell disaster.
]
] When Devon schoolgirl Claire McDonald logged on to check
] her e-mails she was taken aback to find an urgent missive
] from the Pentagon among the chatty greetings from her
] friends. It contained confidential information not
] intended for civilian eyes.
]
] Claire replied to point out the error, but the e-mails
] kept coming, from the Pentagon, the Ministry of Defence
] and elsewhere. One detailed communications problems on
] British warships; another New Zealand's defence strategy.

BBC NEWS | UK | E-mails you wish you'd never sent