As the US weighs joining Israel’s assault on Iran, questions are mounting over whether such an intervention could trigger regime change in Tehran – an outcome that risks splintering the country and sending shockwaves across the region.

ABC News contributor Darell Blocker assesses rising tensions between Israel and Iran after Iran used a missile with multiple warheads in one of their strikes against Israel Thursday.

Iran's Islamic Revolutionary Guard Corps (IRGC) used its long-range, two-stage Sejjil missiles in a recent round of missile strikes targeting Israel, according to Iran's media. Newsweek has reached out to the Israel Defense Forces (IDF) for comment.