WASHINGTON - MAY 12:  Former US President Jimmy Carter smiles while participating in a Senate Foreign Relations Committee hearing on Capitol Hill May 12, 2009, in Washington, DC. The committee is hearing testimony from the former president on US energy independence and security. Getty Images logo Getty Images 6 months ago

WASHINGTON - MAY 12: Former US President Jimmy Carter smiles while participating in a Senate Foreign Relations Committee hearing on Capitol Hill May 12, 2009, in Washington, DC. The committee is hearing testimony from the former president on US energy independence and security.