Tamerlan Tsarnev (right), who with his younger brother, Dzhokhar, allegedly carried out the Boston Marathon bombings, clearly saw himself as an Islamist warrior. But he was also influenced by a range of American extremists, including Texas conspiracy-monger Alex Jones and a variety of anti-Semites. ULIA MALAKIE/AP IMAGES (TSARNAEV); FBI/AP IMAGES (TSARNAEV)
