The last remaining US-Russia nuclear arms control treaty, New START, expires today, leaving the world’s two largest nuclear arsenals without legal limits on nukes for the first time in over half a century. Also, famine conditions spread across Sudan’s Darfur region. And, understanding Australia’s gun ownership and hate law reforms after the Bondi Beach shooting. Plus, we visit the small Scottish island where all of the Olympic curling stones come from.

A month after US forces captured former Venezuelan President Nicolás Maduro, some signs of change have emerged. Acting President Delcy Rodríguez has proposed a sweeping amnesty law that could free hundreds of political prisoners, but families and human rights groups remain wary. Also, the son of former Libyan leader Moammar Gadhafi, Seif al-Islam Gadhafi, has been killed. And, leaders of a fringe ultra-conservative Catholic group, called the Society of St. Pius X, based in Switzerland, say they're going to consecrate new bishops without consent from the Vatican starting this summer. Plus, a reexamination of the Mexican-American war amid a new White House statement.

Russia’s massive overnight attack on Ukraine included hundreds of drones and a record 32 ballistic missiles. Meanwhile, troops on the front line say conscripts are having a tough time filling the shoes of more experienced soldiers. Also, Spanish weather forecasters are facing an alarming increase in online attacks for linking extreme weather events to climate change. And, families in Iran search for their missing loved ones after a brutal government crackdown on protesters earlier this month. Plus, an Australian teenager saves his family from being washed out to sea.