On Going War Between Yemen And The Third Generation Of Al-Qaeda New Tactics, Targets And Weapons -- Yemen Post
Two weeks ago, Al-Qaeda's new attack that killed security director and son of one of Mareb tribe's Sheikhs, Mohamed Rabish Kielan, revealed Al-Qaeda's experience in using booby-trapped letters for attacking personals.
Counterterrorism experts said that in 1986 Maktab Al-Khidmat, the original office for Al-Qaeda in the early 80's, opened a branch where Al-Qaeda members received training courses through which they learned how to make booby-trapped letters, and how to fly gliders and helicopters.
In the last four months, organized terror attacks ranging from the southern parts in Hadramout, like the one in July, when a suicide attack on Sayoun's security compound killed 8 people and injured dozens, to the one witnessed in Sana'a when the US Embassy was bombed and 17 people were killed.
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My Comment: A good article outlining the evolving war between Al Qaeda and an Arab state (Yemen)