Ukrainian President Volodymyr Zelenskyy wants America to help impose a no-fly zone over Ukraine. The U.S. favors other avenues of support, providing weapons and equipment. Now there are signs the Russian advance is stalling. Could there be a diplomatic endgame in sight? Marie Yovanovitch is skeptical. The former U.S. ambassador to Ukraine tells NPR a no-fly zone should be kept on the table, citing the unpredictability and ruthlessness of Russian president Vladimir Putin. Yovanovitch has written a new memoir, Lessons From The Edge. More from her conversation with NPR's Mary Louise Kelly here. Former Naval Intelligence Officer Steven Horrell says there's an emerging possibility of a so-called 'frozen conflict' in Ukraine, with Russian forces failing to advance but also refusing to leave. In participating regions, you'll also hear a local news segment to help you make sense of what's going on in your community.Email us at considerthis@npr.org.