Italy is challenging a US report that cleared American soldiers of wrongdoing in the shooting of an Italian agent in Baghdad, a case that has sorely tested one of Washington's staunchest allies in Iraq. The Italian investigation of the death of Nicola Calipari found there were coordination problems among officials in Iraq and problems with the rules of engagement for checkpoints, Italy's foreign ministry said on its Web site ahead of the report's release Monday. Speaking at a ceremony Monday to honor US troops who died in the liberation of Italy during World War II, Pierferdinando Casini, speaker of Italy's lower house of parliament, said the government's conclusions were made "in the name of truth, clarity and reciprocal loyalty." US Ambassador Mel Sembler, who also spoke at the ceremony, said ties between the two countries would remain strong despite the split.