The ‘Annual Threat Assessment of the US Intelligence Community’ presented to the Senate stated that in spite of the growing proliferation of one-way attack UAVs that perform missile-like functions, China, Iran, North Korea, Pakistan, and Russia will continue to prioritise advanced missiles that can threaten the US.  “However, their militaries almost certainly will plan to pair their high-end missiles with cheaper, expendable systems to stress US missile defences,” it said.