The U.S. Department of Homeland Security (DHS) is developing new guidelines for searches of computers and other electronic data storage devices at U.S. border crossings. The DHS announcement comes a day after the American Civil Liberties Union (ACLU) filed a lawsuit against the Obama administration in U.S. District Court in New York claiming such searches violate privacy and constitutional rights. DHS officials said the searches are necessary to combat terrorists, drug traffickers and others entering the U.S. with illegal or dangerous information. But DHS is putting new restrictions on searches of laptops at U.S. borders to address concerns that federal agents have been rummaging through travelers' personal information. A supervisor now would need to approve holding a device for more than five days. Any copies of information taken from travelers' machines would be destroyed within days if there were no legal reason to hold the information.