But Mr. Natsios did not say what price Sudan would pay if it continued to refuse , only that the Bush administration would move on to a classified '' Plan B . '' While Mr. Natsios 's demands drew the usual sneers from Khartoum , Sudanese officials appeared genuinely spooked by news that the International Criminal Court 's prosecutor would soon be ready to present war-crimes charges against those responsible for the atrocities in Darfur .