Agence France-Presse: Secretary of State Hillary Clinton said the United States “is ready to lead” and make up for lost time in the fight against climate change, as she opened an international forum here. “The United States is fully engaged and ready to lead and determined to make up for lost time both at home and abroad,” Clinton told a forum President Barack Obama set up to build political momentum for UN climate change talks in December in Copenhagen. “The president and his entire administration …