SAQQARA, Egypt (AP) _ Archaeologists have unearthed six 3,500-year-old tombs they believe reveal important details about the structure of government in a period considered Egypt's golden age, the nation's top archaeologist said Thursday. Zahi Hawass, head of Egypt's Supreme Council of the Antiquities, also discussed an exhibit of Egyptian treasures to tour the United States beginning June 30 at Washington's National Gallery of Art. The exhibit is bigger than the blockbuster King Tut show of the 1970s. Earlier this week, archaeologists working on a dig supervised by Hawass just outside Cairo, found the six tombs at the foot of the...