Before revision: upStudents practicing a fire drill in a smoke trailer with a firefighter assisting them alt=|upA fire alarm notification appliance widely used in the US and Canada A fire drill is a method of practicing how a building should be evacuated in the event of a fire or other emergencies.
After revision: upStudents practicing a fire drill in a smoke trailer with a firefighter assisting them alt=|upA fire alarm notification appliance widely used in the US and Canada A fire drill is a method of practicing how a building should evacuate in the event of a fire or other emergencies.