Much of the focus of the war in Ukraine has been about the battle on the ground - but the fight to dominate the skies is just as important. The BBC has interviewed a Ukrainian air defence officer about the battle for control of the skies. Captain Vasyl Kravchuk has a surprisingly ready smile for a man who has endured fifty days of war. They spoke to him via video link from his base at an undisclosed location. He knows the coming weeks will offer no respite. Russia may have received a bloody nose in its aborted attempts to take Kyiv, but with the Eastern region of the Donbas now firmly in Moscow's sights, the men and women of Dnipro's anti-aircraft missile brigade will continue to play a key role in the next phase of the war. Capt Kravchuk said, ‘Past wars have shown that whoever dominates the air wins the war’.