A fire spreads across a mattress to a tent wall during a fire simulation training exercise aboard Forward Operating Base Dwyer, Afghanistan, Dec. 10. The Aircraft Rescue and Firefighting Marines with Marine Wing Support Squadron 373, 3rd Marine Aircraft Wing (Forward), completed the training to demonstrate how quickly a fire can start and spread throughout a tent. Things to avoid are daisy chains, which are multiple circuits plugged into each other to extend another circuit, smoking and candles. Tent inhabitants should also ensure their smoke detectors and fire extinguishers are working and should unplug any electronics not in use.