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 . Edward Snowden leaks revealed extent of telephone data and e-mail surveillance . Some members of Congress troubled by program , seek changes from Justice Dept. , NSA .