Context:
Dzhokhar Tsarnaev, the Boston Marathon bombing suspect, has told investigators that his brother was the driving force behind the attacks and that they were motivated by religion, but did not have help or contact from terrorists or groups overseas, according to media reports quoting U.S. officials.
Tsarnaev, who was arraigned in his hospital bed Monday on charges of using and conspiring to use a weapon of mass destruction resulting in death, has been questioned by interrogators.
More:
http://www.usatoday.com/story/news/nation/2013/04/23/boston-bomber-foreign-motive-dzhokhar-tsarnaev-terrorist-groups/2105705/