He have made the underwear bomb that a Nigerian man named Umar Farouk Abdulmutallab attempted to detonate on a Northwest Airlines flight to Detroit in December 2009. He was also involved in a plot to hide explosives in printer cartridges being shipped to the US. Prior to his death, he was believed to have been working on bombs that could be hidden inside laptops. Al-Asiri, who studied chemistry in the Saudi capital of Riyadh, even once placed explosives inside his younger brother’s clothes in a plot to assassinate Saudi Arabia’s interior minister, Mohammed bin Nayef, in 2009.
Wanted by the U.S., Saudi Arabia and Interpol, al-Asiri fled his native Saudi Arabia , home of 15 of the 19 suspected hijackers in the Sept. 11, 2001 terrorist attacks for Yemen. Official confirmation that the Saudi national and one of America’s most wanted terrorists is dead comes after reports from the United Nations, as well as statements from a Yemeni security official and al-Qaeda tribal leader indicating that the bomb maker was killed in a drone strike in the eastern Yemeni governorate of Marib. Al Qaeda itself has remained silent about its top bomb maker.