The killing of Ashwatthama

Duryodhan humiliates Dronacharya for leaving the battlefield. Shakuni tricks Dronacharya and persuades him to stay. Later, Krishna tells the Pandavas to kill Ashwatthama, to make Dronacharya surrender. As Karna challenges Nakul and Sahadev, Arjun challenges Dronacharya to a fight.