Last week, United States and United Kingdom officials announced new restrictions for airline passengers from eight Middle Eastern countries, forbidding passengers to carry electronics larger than a smartphone into an airplane cabin. Now The Guardian reports, citing a security source, the ban was prompted in part by a plot involving explosives hidden in a fake iPad. From the report: The security source said both bans were not the result of a single specific incident but a combination of factors. One of those, according to the source, was the discovery of a plot to bring down a plane with explosives hidden in a fake iPad that appeared as good as the real thing. Other details of the plot, such as the date, the country involved and the group behind it, remain secret. Discovery of the plot confirmed the fears of the intelligence agencies that Islamist groups had found a novel way to smuggle explosives into the cabin area in carry-on luggage after failed attempts with shoe bombs and explosives hidden in underwear. An explosion in a cabin (where a terrorist can position the explosive against a door or window) can have much more impact than one in the hold (where the terrorist has no control over the position of the explosive, which could be in the middle of luggage, away from the skin of the aircraft), given passengers and crew could be sucked out of any subsequent hole.