CNN confirmed Wednesday that seven children died at Plaza Towers Elementary School, crushed by tornado debris.
Would they be alive if the school had a storm shelter?
Could the city, the state or the federal government have done more to prevent the magnitude of this tragedy?
Key questions as president Obama prepares to visit the storm ravaged areas on Sunday.
Today his Secretary of Homeland Security Janet Napolitano toured the affected area.
The death toll from Monday's tornado now stands at 24. Oklahoma government puts the injured at 325 people.
OutFront tonight: Sen. Tom Coburn (R-OK).