National Security Letter Sheds Light on FBI Internet Probe

After a decade of court battles, the Internet entrepreneur who filed the first legal challenge to a type of secret administrative order known as a national security letter revealed the breadth of an FBI demand in 2004 for information about a customer. National security letters, which empower federal investigators to seek certain customer records without court approval or oversight, were significantly expanded as part of the USA Patriot Act after the Sept. 11, 2001, terrorist attacks.