By AngeloDeVal / Getty Images Around the world, authorities are struggling to stem the illegal trade in cultural property. While this highly lucrative business is booming, the United States has just returned a looted ceremonial relic to the Palestinian Authority. Around the world, authorities are struggling to stem the illegal trade in cultural property. While this highly lucrative business is booming, the United States has just returned a looted ceremonial relic to the Palestinian Authority. A historic event took place on January 5 at the headquarters of the Palestinian Ministry of Tourism an…