History repeats itself?

"I heard a bang, followed by another big bang, and then I saw flames and smoke on the hills," says a villager who witnessed the plane that crashed and killed the commander of Pakistan's air force, Air Chief Marshal Mushaf Ali Mir, his wife and several senior officers. Reuters story.

Former dictator of Pakistan, Gen Zia Ul Haq, also died under mysterious circumstances. Many theories have been proposed but experts believe that it was most likely a poison gas that knocked out the entire crew. You can read a bit more about it in this article. A similar documentary story was shown on BBC when the Russians used a paralysing gas during the 2002 hostage crisis.