Do we need a new system? A horrifying attack in London last week has started a fierce debate about whether it is too easy for criminals to gain asylum in Britain.
Chemical attack sparks anger over UK asylum
Escaped: Police are still looking for the suspect, who ran away after the attack. Glossary
Corrosive - Capable of destroying or eating away at something. Usually used to describe certain acids.
Afghanistan - A mountainous Asian country, slightly larger than France, whose neighbours include Pakistan, Iran and China.
Asylum - When a state agrees to shelter somebody who is fleeing dangerous circumstances. The right to asylum is protected in international law by the 1951 Refugee Convention.
Immigration - The permanent movement of people into a country.
Inefficient - Not working in an organised and effective way.
UN - United Nations. An intergovernmental organisation based in New York that aims to maintain international peace and security.
Forfeit - Give up as a consequence of doing something else.
Inevitable - Unavoidable.
Knee-jerk response - Reacting in a predictable or automatic way, without thinking properly about your decision.