Documents related to air quality are set to be released, shedding light on what officials knew after a major attack. These records are expected to show that municipal officials were aware of unsafe breathing conditions. The release will include data on pollution and air quality reports. Communications between officials will also be made public.

A large number of pages, over 170,000, will be published. This move is expected to be announced soon.

Further information on the release and its contents can be found through the reporting of Gloria Pazmino, CNN.