Eyes are once again focused on transport safety, and the new target is airplane Wi-Fi, such as the Boeing Connexion service recently endorsed by United Airlines. As Wired News' Kevin Poulsen reports, Homeland Security analysts are afraid that onboard Internet access and Wi-Fi could be used to remotely set off explosives or coordinate terror attacks. It's not hard to imagine how the events of Sept. 11 could have been exacerbated by communication between the terrorists on each plane.

While officials aren't proposing to scrap the service, they do want the capability to tap into it immediately, and to identify users by name and seat number so they can be cut off if necessary. To prevent remote detonations, they want the cargo hull to be shielded from wireless signals, which may be a bigger stumbling block that significantly delays adoption of inflight Wi-Fi.

So far these are just proposals from the Justice Department, but given last week's tragic events in London, they are likely to be taken seriously.