Alan Johnson turned up with a statement on aviation security following the Johnny Bomb Pants thing at Detroit. They have snapped into action again, as events demand. They're putting in a whole lot more airport scanners, which all share one interesting deficiency. They are incapable of detecting the sort of explosives that are hidden in Y-fronts.
Still, it will considerably inconvenience passengers, thus discouraging air travel and therefore contributing to saving the planet from all these emissions. (Although the current cold snap appears to be having the same effect without artificial assistance.)