Khadir walked ahead of everyone, guiding you and Alex behind him, until he used the stolen Russian chlorine gas to slow you and Alex down, thereby moving to the side of Al-Katala. Jonathan was the first to find out about this, and therefore was angry when he realized that he had sent his people to their deaths. Rushing in by helicopter, he began to scour all the destroyed buildings until he found you and Alex lying on the floor suffocating from gas. Damn it!