Answer
Yes, Abdullahi Yusuf Ahmed was indeed one of the founding members of the Somali Salvation Democratic Front (SSDF). This organization was formed in 1979 with the primary objective of opposing the oppressive regime of Siad Barre. Ahmed played a pivotal role in establishing and leading the SSDF, becoming one of its most influential figures and contributing to its activities and operations aimed at challenging Barre's authoritarian rule.