Thinktank commissioned as arms control advocates fear Joe Biden may not keep pledge to reduce role of nuclear weapons
The Pentagon has asked a Washington thinktank to draw up a report on the future of the US intercontinental ballistic missile (ICBM) programme and deliver it before the end of January.
The Carnegie Endowment for International Peace (CEIP) will present options based on three rounds of virtual consultations, which began on Tuesday, between Pentagon officials, nuclear weapons experts and arms control advocates.