Leah's special report from Greece
Newsround's Leah has been in Greece where there have been riots, protests and demonstrations on the streets.
Today the country appointed a new Prime Minister. The people are hoping he can bring some calm to the situation.
The country's problems are all to do with money. Greece is running out of it and that could cause big problems around the world, including Britain.
Leah's been finding out why this matters to all of us.