On various street corners in downtown Cleveland you will find these suitcase sized sniffers...plugged into the traffic light control box electric power or another power source.    5 foot high "chimney" pipes extend up from one end of the unit.  Do these units provide realtime data via cell phone or the internet?    Could we map the movement of a volatile chemical through downtown?   How much do they cost?   Who is paying?   Who built them?

Perhaps a public records request will be made to obtain the air quality data for Downtown Cleveland which these devices  collect during the RNC convention next week.