Planes remain vulnerable targets

The next terrorist attack could be carried out by airline passengers who hide bomb ingredients in hair gel or baby milk bottles and assemble their weapon in a locked restroom, security experts warn.

The announcement Thursday of a foiled plot to blow up jetliners flying from London to the U.S. using explosives hidden in hand luggage could be the opening of a new chapter in air travel, they said: hours-long security checks, visual inspections of prescription drugs, bans on everyday items.