How to pronounce“nasam”in English

in the case of the nassam systems have just come from the US we're hearing from the Ukrainian military they're claiming 100 Effectiveness that every nasam's

decades front lines of over a thousand kilometers and cities hundreds of kilometers away from those front lines routinely being hit so those nasam's

like they have only reached one energetic object in Ukraine Kiev and most of the drones most of the air targets were hit with the use of nasam's