The United States and European governments are making a concerted push to stop the fighting, which has killed more than 10,000 Ukrainian civilians.

Ukrainian officials say Russia launched more than 100 drones, rejecting calls for a ceasefire as Zelenskyy says he'll "be waiting for Putin" to join him for direct talks in Turkey.

After a few days of limited activity, the Russians returned to extensively using Shahed drones. From May 11 to 12, more than 200 drones flew over Ukraine. Here, we discuss the background and consequences of these primitive unmanned attacks.