Forcing regime change in Iran was widely considered to be one of several goals the United States and Israel had in going to war with Iran, and something some Iranians wanted, but it now appears far away.After the US and Israel killed Iran's former leader, Ali Khamenei, Donald Trump urged Iranians to "seize control" of their country."When we are finished, take over your government swap out the leadership for one that would be more cooperative with the United States and Israel, wasn't going to work," he said.Dara Conduit, a political science lecturer at the University of Melbourne, says regime change was never a main goal of Trump's, pointing to his statements during the January protests that killed thousands, that "help was on its way"."And that help wasn't forthcoming, and many Iranians were massacred in the streets," she told SBS News."But [regime change] is not something that's been particularly well planned, and I don't think it's something that Donald Trump really is deeply wedded to."Experts say the 'decapitation' strategy — killing the chief at the top — is unlikely to effect regime change in a political system like Iran's, where power is decentralised in what is called a 'mosaic structure'