Former US Secretary of State Hillary Clinton, who is considering whether to make her second challenge for the Democratic presidential nomination in 2016, said "people need to be better informed".
She made the comments in reference to revelations leaked by former US spy agency contractor Edward Snowden.
We need to have a sensible adult conversation about what is necessary to be done, and how to do it, in a way that is as transparent as it can be, with as much oversight and citizens' understanding as there can be.
It would be going down a wrong path if we were to reject the importance of the debate, and the kinds of intelligence activities that genuinely keep us safe.
This is a problem that is well over a decade old, where these capacities have corresponded with increasing outreach to consumers on the business side and increasing concern about security on the government side.
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TV favourite Cilla Black, who has died aged 72, gave viewers a "lorra, lorra laughs" during her long career.
Some rain in the north. Very warm sunshine in the south
Blind Date and Surprise Surprise star Cilla Black,72, has died, according to reports.