What?
What's been happening? Greece is in serious financial trouble. Other European Union countries are offering it a Euro130 billion (HK$1.4 trillion) bailout.
The Greek prime minister unexpectedly said he would ask the people of Greece to approve this rescue plan by holding a referendum - a national vote. This met strong opposition from France and Germany, the countries which had put up the most money for the bailout. The Greek leader decided to resign.
Who?
Who was in charge? The Greek prime minister was George Papandreou. Now, an emergency 'unity coalition' - a government including all parties - may be formed.
Why?
Why did Europe offer to give Greece so much money? Greece is one of the 17 countries which uses the euro as its currency. Although it is a small economy, it has huge debts. A failure to pay them may cause a domino effect and create similar problems for other debt-ridden euro-zone countries like Spain, Portugal and Italy.