Radio host Michael Savage says he'll sue British officials for defamation after he was banned from entering the UK.
The British government says Savage fosters extremism and hate against Muslims and others.
Savage was one of 16 banned from entering the UK.
Also on the list: an American white supremacist, Muslim extremists, and Russian skinheads.
Savage called British Home Secretary Jacqui Smith a "lunatic" for banning him.