Should we encourage dissent? Police and demonstrators clashed in London this week after the UK government moved to ban a pro-Palestine protest group. Some say this is about all our freedoms.
Fury over Palestine protest group ban
Demonstration: The head of London's police force said he was "shocked and frustrated" that hundreds of people attended a protest supporting Palestine Action on Monday. Glossary
Palestine Action - A pro-Palestinian protest network that uses direct action tactics in the UK.
RAF - The Royal Air Force is the UK's air force.
War crimes - Violations of the laws and customs of war.
Palestinians - People from Palestine, an area located in the Southern Levant region of Western Asia.
Elbit Systems - An international military technology company which is based in Israel.
Home secretary - In Britain, they are responsible for national security, immigration and policing.
Proscribe - Forbid by law.
Anarchist - Someone who rebels against any authority.
Narodnaya Volya - A 19th Century Russian revolutionary organisation that used terrorist methods to try to overthrow the tsarist system.
Tsar - Title given to an emperor of Russia before the revolution of 1917. The word was originally used for the Bulgarian monarchs in the 10th Century, but can also be used to refer to anyone with absolute power.
Islamist - An advocate of Islamic fundamentalism. Often used in the West to describe those who believe in imposing Sharia (Islamic law) on societies.
Far-right - A range of ideologies that emphasise social order, racial purity and the elimination of opponents.
Black sites - Detention centres operated by states to hold prisoners who have not been charged with crimes. They have often been used to mistreat prisoners.
Dictatorship - A form of government in which one person possesses all the power without any limits.