I'm aware of this (Mosquito population here in Miami, is just out of control) but a muggy humid climate raises the persistency of a nerve agent, especially if used someplace like a subway or tunnel; maybe a big parking garage.
Grand Central Station? Penn Station? Obvious choices. Maybe those empty suitcases were dry runs for chem/nerve agents...not bombs. Also recall the NYC picture with all the dead people with gas masks on. Wonder if someone could resurrect it and we could see if there was any particular location noted? If I recall correctly---the gassed people were to the left of the Empire State buildu=ing.
Also- their "responders" will come in with real gas masks and such--appear to offer relief- then probably spray more lethal chemicals around or just kill victims who are suffering.
Sorry to sound so morbid but I really believe they intend to kill as many of us as they possibly can.