Catch up on key developments and the latest in-depth coverage of Russia's invasion of Ukraine.
Erdogan's support for Ukraine comes as Turkey has been holding off giving final approval to Sweden joining NATO, saying Stockholm is not effectively cracking down on groups Ankara view as threats.
Ukrainian President Volodymyr Zelenskyy's virtual appearance at the commencement ceremony was a surprise for those in attendance. He was also awarded an honorary Doctor of Humane Letters degree.
As Russia launched its full-scale invasion of Ukraine, expectations were low for Ukraine's president. But Volodymyr Zelenskyy has confounded both his allies and his enemies with his performance.
The Ukrainian president spoke to Prime Minister Rishi Sunak and the Parliament, and made a plea for warplanes.
This is the first summit to take place with Ukraine as an official candidate to join the European Union.
The Ukrainian government's recent shake-up drew attention to corruption allegations implicating senior officials. Here's a short history of the country's efforts to combat graft.
A string of resignations, dismissals and reassignments shook Ukraine's government, as Ukrainian President Volodymyr Zelenskyy and other leaders of the government confirmed the shake-up.
Volodymyr Zelenskyy is visiting Washington to meet with President Biden and Congress on Wednesday. The trip comes as lawmakers are debating billions more in aid for Ukraine.