NAIROBI, Kenya (AP) — American-born jihadi Omar Hammami says in a new video that he fears members of his own Somali militia group may kill him over differences of opinion.Hammami, known as Abu Mansur al-Amriki, or "the American," appears in a video saying he has disagreed with his comrades in the al-Qaida-linked al-Shabab militia on Islam's Sharia law and strategy.