60 Minutes

IRAN'S ASSASSINS –While Iran's backing of Hamas in Gaza and Hezbollah in Lebanon is widely known, the regime is quietly carrying out a shadow war in the U.S. and Europe, deploying proxy assassins to silence or eliminate critics of the regime. Britain's head of counter-terrorism policing, Matt Jukes, tells correspondent Lesley Stahl they're noticing a significant uptick in Iran's efforts. In the U.S., Stahl meets some of the targets, including former White House national security adviser John Bolton and Iranian American activist Masih Alinejad. Shachar Bar-On is the producer.

THE HERITAGE WAR –Correspondent Bill Whitaker reports from Kyiv on Russia's continued war and what Ukrainians say is the deliberate destruction and looting of the country's museums, churches and monuments – a strategy believed to come straight from the Kremlin – and a potential war crime. Whitaker tours the remains of shelled churches and bombed libraries, and speaks with museum workers who are risking their lives to save Ukraine's heritage. Heather Abbott is the producer.

HORSE RACING REFORM? –As the Justice Department winds down one of the biggest horse doping investigations in U.S. history, correspondent Cecilia Vega examines the wiretaps that helped solve the case and convict dozens of veterinarians, horse trainers and drug distributors. Lisa Lazarus, the woman heading up the new national regulator tasked with cleaning up horse racing, sits down with Vega to discuss the moment of reckoning and the sport's future. Sarah Koch is the producer.