U.S. News & World ReportCause of Iowa derailment, oil spill amount still under wrapsHouston ChronicleDOON, Iowa (AP) — Crews were scrambling Saturday to clean up a BNSF oil train derailment in northwest Iowa that dumped crude into floodwaters, while officials seek to get a handle on the extent of the spill and its cause.BNSF: Estimated 230000 gallons of oil spilled in derailmentWashington PostThe Latest: Estimated 230000 Gallons of Oil SpilledU.S.