Executive Secretary of the Comprehensive Nuclear Test Ban Treaty Organization (CTBTO) Lassina Zerbo smiles during his meeting with Russian Foreign Minister Sergey Lavrov in Moscow, Russia, October 16, 2018.

16.10.2018#5668039

Executive Secretary of the Comprehensive Nuclear Test Ban Treaty Organization (CTBTO) Lassina Zerbo speaks to Russian Foreign Minister Sergey Lavrov during their meeting in Moscow, Russia, October 16, 2018.

16.10.2018#5668037

Russian Foreign Minister Sergey Lavrov speaks to Executive Secretary of the Comprehensive Nuclear Test Ban Treaty Organization (CTBTO) Lassina Zerbo during their meeting in Moscow, Russia, October 16, 2018.

16.10.2018#5668035

Russian Foreign Minister Sergey Lavrov, left, welcomes Executive Secretary of the Comprehensive Nuclear Test Ban Treaty Organization (CTBTO) Lassina Zerbo during their meeting in Moscow, Russia, October 16, 2018.

16.10.2018#5668030

Russian Foreign Minister Sergey Lavrov, left, shakes hands with Executive Secretary of the Comprehensive Nuclear Test Ban Treaty Organization (CTBTO) Lassina Zerbo during their meeting in Moscow, Russia, October 16, 2018.

16.10.2018#5668026