Answer
Al-Qaeda in the Arabian Peninsula (AQAP), an affiliate of al-Qaeda, provided Abdulmutallab with the bomb he attempted to use in the failed Christmas Day 2009 Detroit plane bombing. AQAP is based primarily in Yemen and is considered one of the most active branches of the terrorist organization globally. Abdulmutallab had connections with AQAP in Yemen, where he received training and resources for his attempted attack.