Eric Lipton Nyt News Service

Citizens of 14 nations, including Pakistan, Saudi Arabia and Nigeria, who are flying to the United States will be subjected indefinitely to the intense screening at airports worldwide that was imposed after the Christmas Day bombing plot, Obama administration officials announced Sunday.

Citizens of 14 nations, including Pakistan, Saudi Arabia and Nigeria, who are flying to the United States will be subjected indefinitely to the intense screening at airports worldwide that was imposed after the Christmas Day bombing plot, Obama administration officials announced Sunday.