An elderly man holds a poster showing Iran's slain supreme leader Ayatollah Ali Khamenei (L) and his son Ayatollah Mojataba Khamenei (R) during a rally to show their solidarity and support to the new Iranian supreme leader Ayatollah Mojataba Khamenei in Tehran, on April 29, 2026. US President Donald Trump on April 29 warned Iran to "better get smart soon" as efforts by Washington and Tehran to end hostilities appeared at a standstill. (Photo by AFP via Getty Images) /