Ukraine’s sea drones, part of Ukraine’s fightback in the Black Sea

At a secret makeshift military base a nondescript van and pickup truck tow two gray objects covered by tarpaulin mounted on trailers. In the driving rain, they resemble something more akin to a Boston Whaler, rather than hiding one of Ukraine’s most closely guarded secrets. Perched on the banks of a secret lake,

CNN was given exclusive access to the base where much-vaunted sea – or surface – drones are tested.