A policeman clears the sidewalks as an air raid siren begins to wail through the streets of Taipei.
Wally Santana / AP
Pedestrians use their smart phones in a subway station while police keep pedestrians off the streets during an air raid drill in Taipei, Taiwan, Wednesday, May 18, 2011. Taiwan held its decades-old annual air raid drill Tuesday, despite warming ties with China, the exercise's designated adversary. The Wan-an, or "safety for everyone" exercise, is an island-wide drill premised on widespread Chinese air attacks.
Wally Santana / AP
Police guide pedestrians off a street during an air raid drill in Taipei.
Wally Santana / AP
A policeman stops motorcyclists during an air raid drill in Taipei.
New recruits take part in a drill session in winter conditions on January 21, 2011 in Yichun, Heilongjiang province of China. 150 new recruits take part in exercises in freezing temperatures, -25 Fahrenheit, during an outdoor drill session.
Chinese police undergo fire rescue training in a smoke-filled train at a railway station in Beijing on Dec. 18. Thousands of people are killed every year in deadly fires in China due to lax safety measures.
One would think that a person would have to perform this kind of drill again, and again and again to even begin to become comfortable in such a situation. Maintaining a calm, rational approach to rescue and survival would be very difficult if both vision and breathing were impaired.