Footage showing what Human Rights Watch arms experts have identified as RBK-500 ZAB-2.5SM incendiary bombs mounted on a Russian attack aircraft at a Russian air base in Syria, June 18, 2016.

Footage showing what Human Rights Watch arms experts have identified as RBK-500 ZAB-2.5SM incendiary bombs mounted on a Russian attack aircraft at a Russian air base in Syria, June 18, 2016.

© 2016 Russia Today/YouTube