It comes after Ukraine said it was behind a drone strike on a Russian oil base in the region. Submit your questions for our correspondents in the box below.
A Ukrainian defense initiative is making steel armor for the country's inventory of American-made Patriot batteries, providing the air-defense systems with extra protection against shrapnel.
The MIM-104 Patriot is a surface-to-air missile system that has been a critical part of Ukraine's air-defense umbrella. Several Western nations, including the US, have sent Patriot control systems ...