BAGHDAD, Iraq - A roadside bomb killed at least two U.S. soldiers Saturday in Mosul, and many parents kept children away from classes in the capital after leaflets attributed to Saddam Hussein's party warned of a "Day of Resistance" against the U.S. occupation. Also Saturday, witnesses said an oil pipeline was on fire about 10 miles north of Saddam's hometown of Tikrit, an area of widespread opposition to the U.S.-led occupation. Witnesses said they suspected sabotage because the blaze was preceded by an explosion. Sabotage to pipelines and the decayed state of Iraqi's infrastructure have slowed efforts to revive the...