Ahmad Mohammad Ali al-Hada
Ahmad Mohammad Ali al-Hada is an al-Qaeda operative from Yemen whose family was described by US government officials as a "supercell" within the al-Qaeda network. By February 2002, the "communications hub" which al-Hada running was no longer active following the death of his son, Samir. Early life and Al-Qaeda
Al-Hada is native of Dhamar Governorate, and is a veteran of Soviet–Afghan War, where he met Osama bin Laden. It's reported that al-Hada was a close friend of Bin Laden. From 1996 until 2006, he operated, along with his son, Samir Al-Hada, an al-Qaeda safe house and a communication center in Sana'a, which was the direct link from al-Qaeda central to Yemen. He was captured by the Yemeni government in 2006, but was set free, possibly after a tribal deal. As of 2007, his whereabouts are unknown. Family
Al-Hada's son-in-law, Khalid al-Mihdhar, was one of the hijackers that flew American Airlines Flight 77 into the Pentagon as part of the September 11 attacks. Another son-in-law, Mustafa Abdulkader, has been listed on FBI terror alerts. In February 2002, Al-Hada's son, Samir al-Hada, committed suicide using a hand grenade, to avoid questioning by security forces about the Cole bombing. Two of Ahmed Al-Hada’s brothers were killed in Afghanistan during operation “Absolute Justice” and a third brother, Abdullah Al-Hada, is wanted by the Yemen authorities for terror charges. USS Cole bombing
Al-Hada allegedly provided the telephone number in Yemen that served as the switchboard for al-Qaeda operations leading up to the USS Cole bombing and September 11 attacks. In The Looming Tower he was cited  as being in Yemeni custody. References

Yemeni al-Qaeda members
People from Dhamar Governorate
Year of birth missing (living people)
Living people