Russian gains in Kursk open possibility of redirecting North Korean troops to Ukrainian front / Almost 400 people evacuated from Sudzha district of Kursk Region / Russia prepares to attack Sumy Oblast from Kursk as Ukrainian forces reposition, says military expert / Ukraine loses Sudzha, the biggest town it had occupied in Russia's Kursk region / Russian National Guard to ensure security in Kursk Region on Victory Day eve -- acting head / Ukraine Retreats From Most of Russia's Kursk Region / Russia Says Evacuated Over 350 Civilians From Retaken Areas in Kursk Region / Over 370 people taken out of Kursk Region's liberated territories since March 12 / Putin Urges Ukrainian Troops in Kursk Region to Surrender / Putin's troops say they're close to retaking Kursk from Ukrainian forces - here's why it matters