Summary: British Ministry of Defence (M.O.D) officials mistakenly sent emails meant for the Pentagon to Mali , a Russian ally . The error was due to confusion between the domain names 'dot mill' for Pentagon and 'dot ml' for Mali . A Dutch internet entrepreneur managing Mali 's domain name discovered the misdirected emails. Among the emails were sensitive details about British and American personnel working on hypersonic missiles . The M.O.D is investigating the extent of potential security breaches. With the contract end ing, concerns arise about the possible misuse of the misdirected emails. ...