Taliban Poison attack or mass hysteria? Chaos hits another Kabul girls' sschool

1. 
   
   What's being discussed in this article?
2. 
   
   When did the event happen? (Is this breaking news or something that's been analyzed and discussed for a while?)
3. What questions do you have that would help make this article make more sense to you? What more do you need to learn about to be able to report on this event?
   
   
   1. The article is about an alleged poisonous gas attack on a girls' high school. The article raises the question of whether it was a Taliban attack or merely hysteria among the school.
   
   
   2. This event took place August 25, 2010. Incidences of Afghan militant attacks are common among female educational facilities within Afghanistan. Most of them are only assumed to be caused by the Taliban.
   
   
   3. A local doctor said that he had studied hysteria reactions before and the condition of the girls at the school are not common effects of hysteria. However, blood tests were taken and found clear of any kind of poison. So it seems like it was neither hysteria nor poisonous gas that caused the girls to get sick. So, what could have caused this?