No regime invokes international law more fervently than when it sees its power being challenged. The moment American and Israeli forces struck Iranian targets, officials in Moscow and Tehran rushed to rediscover the UN Charter, denouncing the operation as unlawful. Their sudden reverence for the "rule-book" is politically convenient — but it also forces a serious question: on what legal grounds can the use of force against Iran be justified? One of U.S. President Donald Trump's principal argum