What is the Islamic State, and what attacks has it inspired by offshoots and lone wolves?

WASHINGTON (AP) -- The FBI says it recovered the stark black banner of the Islamic State extremist group from the truck that an American man from Texa

What is the Islamic State, and what attacks has it inspired by offshoots and lone wolves?
WASHINGTON (AP) -- The FBI says it recovered the stark black banner of the Islamic State extremist group from the truck that an American man from Texa