The secret technology that allows spies to monitor the phone calls of millions of Americans is under attack by U.S. lawmakers who say it could allow spies to hack into iPhones and other smart devices.

Key points:The U.K. has a bill to require warrants for spying on smartphones, but it has been blocked by the U.k.’s top courtIn Britain, the spy planes are used by the British National Security Agency, known as BNSS, which is also known as the Government Communications Headquarters.

It also has an air base in the U, which could potentially give it access to communications in other countries.The U