About this picture: U.S. President Barack Obama, flanked by his predecessors George W. Bush and Bill Clinton, on Saturday said the two former presidents would lead a national drive to raise money for Haiti's earthquake survivors.
By coming together in this way, these two leaders send an unmistakable message to the people of Haiti and to the people of the world.
In these difficult hours, America stands united.
We stand united with the people of Haiti, Obama said.
Haitian authorities believe as many as 200, 000 died in Tuesday's earthquake that devastated the Caribbean nation, prompting a worldwide humanitarian response as rescuers race against time to save people still trapped in the rubble.
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