"The findings will reinforce efforts by the US government to tighten up visa controls." Now you're talking. Although a 48-hour wait is not enough.

From the [1] Telegraph :

...The US homeland security secretary, Michael Chertoff, singled out extremists who have been radicalised in Britain as a danger to America. A report compiled by US security chiefs on the threat to their homeland concluded that British-based Muslims would regard "the use of violence here as legitimate".

The findings will reinforce efforts by the US government to tighten up visa controls. Mr Chertoff is calling for visitors from the European Union who enter the US via the visa waiver scheme to register their personal details 48 hours before taking a transatlantic flight.