i spoke about tehran�*s aims with negar mortazavi, who is a senior fellow at the center for internationaln washington. negar, thank you very much forjoining us here on bbc news. we know typically israel doesn't speak about its campaign against the iranian military presence in syria. but explain to us the background to this latest attack. this is a continuation of a shadow war that has been ongoing between iran and israel in syria, way before october 7. it is tangentially related to the bigger conflict we are seeing but it has escalated since the october 7 attack and israel's subsequent attacks on gaza. i see it from the big picture view as part of that a proxy war, essentially the nonconventional war, there war of attrition israel is conducting in gaza. this is in support of the palestinian cause and to raise the cost for israel. in response to this, iran has now vowed revenge. when you hear that, how do you interpret it, how much credence do you give it? what's sort of form do you think you could take? we saw a series of assassinations before this round, we saw the assassination of a hez