This week is Refugee week.
Refugees are people who are forced to leave their home country. Often because it has become too dangerous to live there.
In 2010 17,990 people came to the UK as refugees hoping to get permission from the government to make a new life here.
All week people in the UK are celebrating the contribution refugees have made.
Ali left his home in Afghanistan when he was little because of the war.
Watch his story.