On September 10, U.S. Ambassador to Spain Duke Buchan III returned a rare letter written by Christopher Columbus to Spanish Minister of Culture José Guirao. The letter had been stolen from a museum in Spain in 2004 and was later recovered by US Immigration and Customs Enforcement. The letter is a cultural asset of enormous historical and documentary value, in which Columbus narrates to the Spanish royals his successive trips to America. The recovery of the letter highlights the excellent relationship between Spain and the United States and our cooperation in the fight against illicit trafficking of cultural property.