When is violence necessary?A Federal manhunt is underway across the United States. A sniper has killed three people in three different cities during the last seventy two hours and he's gone to ground somewhere in Washington D.C. No-one can find him, and riots have erupted on the streets in response to the shootings.The lead suspect is a police officer.As the search for the cop intensifies, the violence engulfing the U.S capital means nowhere and no-one...