I didn’t know they had anti-bear spray but apparently they do.  It seems a can of it went off in an airport in Juneau Alaska closing it down.  It got into the ventilation system and instead of running bears away, it ran everyone out of the airport.  They even had to take one person to the hospital.  The airport was closed for a hour and a half because of the anti-bear spray.  This stuff comes in a canister like pepper spray and is supposed to stop an attacking bear.  Well it works on people but I don’t know about bears.