Obama plays international game of 'telephone'

President Barack Obama spoke by phone Thursday with four world leaders, two former U.S. presidents, and the United Nations secretary general to drum up international support for Haiti.

Among those on his call list: President Lula of Brazil, Prime Minister Harper of Canada; President Calderon of Mexico; President Bachelet of Chile; former U.S. Presidents George W. Bush and Bill Clinton; UN Secretary General Ban Ki Moon; and the U.S. Ambassador to Haiti, Ken Merten.

So far, Obama has been unable to reach President Rene Preval of Haiti, but Amb. Merten relayed a conversation he'd had with Preval following Tuesday's earthquake, where he conveyed the United States'  commitment to helping the island nation recover from the tragedy