WASHINGTON, Feb 14 (Reuters) - Russia has held at least 6,000 Ukrainian children - likely many more - in sites in Russian-held Crimea and Russia whose primary purpose appears to be political re-education, according to a U. The youngest child identified in the Russian program was just four months old, and some camps were giving military training to children as young as 14 years, Raymond said, adding that researchers had not found evidence those children were later deployed in combat. See here for a complete list of exchanges and delays