<sod >Investigators looking into the cause of the incident Ã¢ÂÂ which saw people run from the facility as numerous passengers began coughing inside Ã¢ÂÂ believe they found the chemical during a sweep of the airport, which had to be evacuated.< eod>< sod > Investigators looking into the cause of the incident Ã¢ÂÂ which saw people run from the facility as numerous passengers began coughing inside Ã¢ÂÂ found a canister believed to be CS gas or spray during a sweep of the airport, which had to be evacuated.< eod>