The medical examiner has revised the death toll in yesterday's tornado in Moore, Okla., to 24, down from 51, CNN reports. Nine of the fatalities are children, at least seven of whom were killed at Plaza Towers Elementary School in Moore, police said. Emergency personnel continue to scour the school's rubble. President Barack Obama said Tuesday he didn't yet know the full extent of the damage but promised aid. "Oklahoma needs to get everything it needs right away," he said.