Defense Secretary Lloyd Austin is committing to keep U.S. weapons moving to Ukraine as Kyiv faces one of its toughest moments against a renewed assault by Russia. Austin and as many as 50 defense leaders from Europe and around the world were meeting Monday to coordinate more military aid to Ukraine. He said, “We’re meeting in a moment of challenge.” He noted that Russia’s new onslaught on Kharkiv showed why the commitment was vital. Austin vowed to keep U.S. weapons moving “week after week.” However, those weapons have not fully reached the front lines and Ukrainians officials have said they are still struggling to fight back against a vastly more equipped Russian military.

A British court has ruled that WikiLeaks founder Julian Assange can appeal against an order that he be extradited to the U.S. on espionage charges. Two High Court judges on Monday said Assange has grounds to challenge the U.K. government’s extradition order. The ruling sets the stage for an appeal process likely to further drag out a years-long legal saga. Assange faces 17 espionage charges and one charge of computer misuse over his website’s publication of a trove of classified U.S. documents almost 15 years ago. The Australian computer expert has spent the last five years in a British high-security prison after taking refuge in the Ecuadorian Embassy in London for seven years.

The Supreme Court has rejected an appeal by a Canadian-born former Guantanamo detainee who was seeking to wipe away his war crimes convictions, including for killing a U.S. soldier in Afghanistan. Omar Khadr had waived his right to appeal when he pleaded guilty in 2010 to charges that included murder. But his lawyers argued that a subsequent ruling by the federal appeals court in Washington called into question whether Khadr could have been charged with the crimes in the first place. A divided three-judge panel ruled that, despite the appellate ruling, Khadr gave up his right to appeal. Khadr was released from prison in 2015.