Yemen’s importance as a terrorist base appears to be growing. It is the place where Umar Farouk Abdulmutallab (the Nigerian airline bomber) was radicalized and where Major Nidal Malik Hasan’s spiritual guide, Anwar al-’Awlaki, lives. This chilling warning reads entirely plausible: “Umar Farouk Abdulmutallab, charged with the attempted Christmas Day bombing of Northwest Airlines flight 253, told FBI agents there were more just like him in Yemen who would strike soon.”

