Customs insists that terrorism and child pornography are sufficient justification for electronics searches. And even civil libertarians agree it makes sense for customs to search luggage, which could pose immediate dangers to aircraft and passengers. But, says Marc Rotenberg, executive director of the Electronic Privacy Information Center, "customs officials do not go through briefcases to review and copy paper business records or personal diaries, which is apparently what they are now doing in digital form. These pda's don't have bombs in them."