IT consultant Amir Khan, a U.S. citizen, has been subjected to U.S. Customs questioning for a total of more than 20 hours after returning from a number of trips abroad. Customs officials have searched Khan’s laptop computer, books, personal notebooks and cell phone. He has never received an explanation for why he has repeatedly been singled out. “People keep their lives on these devices,” said Lee Tien, senior staff attorney for the Electronic Frontier Foundation. “The government should not be able to read this information.”