Mansour Nasser al Bihani is a citizen of Yemen who is reported to have died fighting in Somalia in 2011.
He is reported to have emigrated to Afghanistan, with Abdul Aziz bin Attash, and his family, who, like al Bihani, was a Yemeni who also had brothers who were Guantanamo captives.
[1][2] He is reported to have fought in Chechnya under Ibn Al Khattab, until he was wounded and returned to Afghanistan.
According to a 2007 report from the Jamestown Foundation both Mansur and Zakariya surrendered to Yemeni authorities later in 2006.
[2] Josceylyn wrote those he trained included Omar Hammami, "an American who serves as a Shabaab commander, propagandist, and recruiter."