GUADALAJARA, Mexico (Reuters) - The United States' occupation of Iraq will come under fire at a summit of European and Latin American leaders on Friday but they will pledge more action in the fight against terrorism. The U.S.-led war was firmly opposed across much of Europe and Latin America, and the mounting violence in Iraq has many leaders fearing the situation is spinning out of control. President Bush's attempts to rally support for his Iraq strategy have been seriously undermined by the photographs and video tapes of American soldiers abusing and humiliating Iraqi prisoners. There are several U.S. partners on...