"But the international jihad movement is different, analysts say. It has become virulently anti-American, anti-Western, and steeped in the kind of absolutist religious fervor that is the hallmark of bin Laden's al Qaeda network. In that, American holy warriors resemble their brethren overseas: They tend to be young, smart, and motivated, often introverted and detached, and ready to risk life and limb. "These are the true believers," says Howard University's Sulayman Nyang, author of Islam in the United States of America. "You feel you are an instrument of God, or part of a historical force."