[Pelham]

Turkish doctors treating the victims identified the agent as sarin.

Chlorine is an irritant that in confined spaces can kill. Not likely in open air. Sarin is a nerve gas that kills by paralyzing the diaphragm muscles. You suffocate.

[Rashputin]

I understand the difference but my thought was that Chlorine or something other than Sarin would explain the lack of casualties among those handling the victims of the attack.