“At least five cases have been filed in federal courts since the government’s widespread collection of telephone and Internet records was revealed last month. The lawsuits primarily target a program that scoops up the telephone records of millions of Americans from U.S. telecommunications companies.  Such cases face formidable obstacles. The government tends to fiercely resist them on national security grounds, and the surveillance is so secret that it’s hard to prove who was targeted. Nearly all of the roughly 70 suits filed after the George W. Bush administration’s warrantless wiretapping was disclosed in 2005 have been dismissed.”