Edward Yeranian CAIRO, EGYPT ? Leaders of eastern Libya#39;s self-declared autonomous region of Barqa declared Saturday that they had begun exporting oil from the port of Sidra and would share revenues with the central government in accordance with a 1951 constitution. Prime Minister Ali Zeidan told journalists later that government authorities have warned a North Korean-flagged oil tanker to leave Libyan waters or face attack. Libyan Prime Minister Ali Zeidan repeated an official warning to a North Korean-flagged oil tanker...