29 April 2003 Iraq’s Baiji refinery — the biggest and newest of the country’s three main refineries — is being protected by members of the nearby Qaissi tribe. For the 5,000 workers at the Baiji refinery, 200 kilometers north of Baghdad, the first real contacts with US soldiers have yet to come. Hundreds of US army trucks can been seen moving north on the road from Baghdad to Mosul, but…