He has been charged with espionage and remains in diplomatic limbo at the Moscow airport after seeking temporary asylum . Disclosure unprecedented as intelligence officials seek to be more transparent . National security court has periodically renewed collection of telephone data . Comment: Some members of Congress troubled by program , seek changes from Justice Dept. , NSA .
Disclosure unprecedented as intelligence officials seek to be more transparent . National security court has periodically renewed collection of telephone data . Comment: Some members of Congress troubled by program , seek changes from Justice Dept. , NSA .