In our news wrap Wednesday, Germany's chancellor offered to help Ukraine build long-range missile systems that could strike deep into Russia, a judge ordered the release of a Russian-born scientist and Harvard researcher saying she was unlawfully held by immigration authorities, the White House says President Trump issued a full pardon for former Congressman Michael Grimm. PBS News is supported by - https://www.pbs.org/newshour/about/funders

The new aid distribution system in Gaza was quickly overwhelmed by Palestinians who for 11 weeks have been blocked from assistance. The Gaza Humanitarian Foundation, backed by the U.S. and Israel, says the old UN-led system allowed Hamas to flourish. But humanitarian groups say the new system is incapable of alleviating the suffering of Gazans. Nick Schifrin discussed more with Ciarán Donnelly. PBS News is supported by - https://www.pbs.org/newshour/about/funders

In the past week, 30 Ukrainians have died and more than 163 others injured as Russia escalated its bombing campaign amid U.S. efforts to end the war. It prompted President Trump to lash out at not only Russian President Putin, but also Ukrainian President Zelenskyy. Laura Barrón-López discussed more with retired Army Col. Robert Hamilton of the Foreign Policy Research Institute's Eurasia Program. PBS News is supported by - https://www.pbs.org/newshour/about/funders

In our news wrap Monday, police arrested a British man after he drove into a crowd of fans in Liverpool as they celebrated their team's Premier League championship, health officials in Gaza say the latest round of Israeli airstrikes killed at least 52 people and President Trump says he's pardoning a former Virginia sheriff who was convicted of federal bribery charges. PBS News is supported by - https://www.pbs.org/newshour/about/funders

A new book delves deep into the rise and fall of the Russian paramilitary Wagner Group and its close ties to Vladimir Putin. Nick Schifrin sat down with Candace Rondeaux, author of "Putin's Sledgehammer: The Wagner Group and Russia’s Collapse into Mercenary Chaos." PBS News is supported by - https://www.pbs.org/newshour/about/funders

In our news wrap Sunday, Poland scrambled its air defenses as Russia conducted an aerial assault on neighboring Ukraine, Israel continued making deadly airstrikes across the Gaza Strip, Elon Musk signaled he may be easing out of his role in efforts to slash government spending under Trump, and Memorial Day preparations are underway at Arlington National Cemetery. PBS News is supported by - https://www.pbs.org/newshour/about/funders

Nearly a quarter of global maritime trade goes through the South China Sea. In recent years, it’s become the site of clashes between Chinese coast guard ships and Philippine vessels as Beijing tries to exert its claim to virtually the entire sea despite international law. John Yang speaks with Andrew Chubb, Asia Society fellow and senior lecturer at Lancaster University, for more. PBS News is supported by - https://www.pbs.org/newshour/about/funders

In our news wrap Saturday, Russia and Ukraine exchanged hundreds of prisoners hours after a large-scale Russian attack on Kyiv, dozens of staff members have been removed from Trump’s National Security Council, the U.S. measles outbreak passed 1,000 confirmed cases, tennis star Novak Djokovic won his 100th career singles title, and a wildlife center is going to great lengths to help a bear cub. PBS News is supported by - https://www.pbs.org/newshour/about/funders

This week's prisoner exchange between Russia and Ukraine was the largest since the war’s onset. But skepticism of a lasting truce, and President Trump’s peace-making, remains. Bridget Brink resigned as ambassador to Ukraine in April, faulting the Trump administration’s Ukraine policy. Brink joined Amna Nawaz to discuss the war and her resignation. PBS News is supported by - https://www.pbs.org/newshour/about/funders

Two Israeli embassy staffers, who were set to be engaged, were shot and killed Wednesday night in Washington. The killings sparked immediate, global outrage and anger. The assailant was charged with two counts of first-degree murder, along with other crimes. He allegedly yelled "free Palestine" after the shooting and reportedly told police he did it. Nick Schifrin reports. PBS News is supported by - https://www.pbs.org/newshour/about/funders