Russia presented the 9M729 (SSC-8) missile and its technical parameters to foreign military attachés at a military briefing on 23 January 2019, held in what it said was an exercise in transparency it hoped would persuade Washington to stay in the treaty. The Russian Defence Ministry said diplomats from the US, Britain, France and Germany had been invited to attend the static display of the missile, but they declined to attend. The US had previously rejected a Russian offer to do so because it said such an exercise would not allow it to verify the true range of the missile. A summit between US and Russia on 30 January 2019 failed to find a way to preserve the treaty.