Mark Medish
former Senior Director for Russian Affairs, National Security Council

Debra Cagan
former US State Department

Captain Mark Breor
Commanding Officer of the USS Memphis

Charles Diggs
journalist

Grigory Nekhoroshev
journalist

Aleksandr Golts
Russian military analyst

Commodore David Russell
commanding officer of the UK’s submarine, HMS Vanguard

Commander Alan Hoskins
project leader of the Royal Navy’s submarine escape and rescue team

Paal Dinessen
diver