The IMF's pivotal role in resolving Greece's debt crisis

This weekend promises to be a fraught one for Greece, as the end of June deadline looms to repay nearly $2 billion to the International Monetary Fund. Eleventh hour negotiations resume Saturday between Greece and its European Union creditors. The IMF has been a key player in the fraught negotiations in Brussels, as the economist, Irwin Stelzer from the Hudson Institute in Washington, tells the BBC's Mike Johnson.