The sides will discuss a Black Sea ceasefire and verification mechanisms for a wider truce, the US national security adviser has said A Black Sea maritime truce will be one of the top issues on the agenda of the upcoming US-Russia meeting in Riyadh, US National Security Adviser Mike Waltz told CBS on Sunday. If reached, the ceasefire deal would allow both Moscow and Kiev to “move grain, fuel, and start conducting trade” in the sea again, according to the official. Waltz hailed the US-mediated