What to know about the protests shaking Iran as tensions remain high over its nuclear program

Widespread protests have gripped Iran, fueled by economic woes and a collapsing currency, now trading at some 1.4 million to $1. The Islamic Republic faces mounting pressure as its "Axis of Resistance" weakens and U.S. threats loom. Decades of tense U.S.-Iran relations, marked by revolution and conflict, continue to shape the volatile regional landscape.