AXUM, Ethiopia -- The Ark of the Covenant was built by Moses to hold the stone tablets of the Ten Commandments -- at the command of God himself. For centuries in Jerusalem, it was the literal dwelling of the Most High, secreted in the darkness of the Holy of Holies. Then, it disappeared. For more than 2,000 years, the whereabouts of the Ark have been shrouded in mystery, despite countless attempts to track it down. There are many theories as to the whereabouts of the holy relic. Some say it's buried under the Temple Mount and others contend that it...