At around 1000 am this morning (4-21-03) there was a AA jet parked at the gate with a huge amount of emergency vehicles around it. I saw multiple fire trucks, Metro decontamination trailers, HAZMAT teams, and multiple people getting into silver high temp firefighting suits, yet no sight of a fire. There also was not a real sense of urgency since the plane sat there for a least the entire time we were at IND (about 45 min turn). No one was saying anything, and it was NOT a drill. Anyone know what happened?