The US Secret Service has tightened staff guidelines in an attempt to stop any repeat of the Colombia sex scandal.

BBC: Secret Service Colombia scandal prompts new rules

Next I look to the post-Columbine efforts of the US Department of Education in tandem with the US Secret Service.

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In a statement, the US Secret Service said the latest measures meant that all 12 of the agents involved in the night out in Cartagena, Colombia, had now been disciplined.

BBC: Obama criticises 'knucklehead' sex scandal agents

In a moment of pure comedy from a book that veers between entertainment about the geekiness of it all and the scary extent of unchecked lawlessness on the web, Glenny relates how the US Secret Service was unwittingly investigating a secret agent from the FBI.

BBC: Man at a computer

He has put himself back in the race by winning Georgia: he gets secret service protection from today, the US Government's seal of seriousness on a candidate.

BBC: Romney fails to seal the deal on Super Tuesday