From The Danger Room (Wired):
Saturday's terrorist attack on the Marriott Hotel in Islamabad, Pakistan, caused massive destruction and loss of life. One of the reasons why: The bomb contained a lethal accelerant, found in some of the world's most powerful munitions. The BBC coverage of the bombing notes:
There is no footage of the main blast because it destroyed the camera, but officials said the vehicle was packed with 600kg of high quality explosives as well as grenades and mortars.
Aluminum powder was also used to accelerate the explosion and added to the ferocity of the blaze, officials said.
Aluminum powder has long been used to boost the power of explosives. Blast weapons like the 15,000-pound BLU-82 Daisy Cutter and the 21,600-pound "Mother of All Bombs" use it to increase their destructive force.
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My Comment: Who provided these ingredients? My guess is that it is either the Pakistan military, or its intelligence services. If I was the Pakistani President or PM, I will be very concerned now.