U.S. National Security Advisor Mike Waltz on Thursday responded to tension between U.S. President Donald Trump and Ukrainian ...

Lena Surzhko Harned, Penn State (THE CONVERSATION) Ukraine President Volodymyr Zelenskyy was shut out of the discussions concerning the future of his country, which took place in Saudi Arabia on ...

But as David Kuan-Wei Chen, the executive director of the Center for Research in Air and Space Law at McGill University in Canada, explains, the fallout from Russia’s invasion of Ukraine is ...