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The difference between survival and death during a tornado can be helped by increased warning time. The National Weather Srvice says that the ability to forecast a tornado system has improved drastically. Chip Reid reports on the improving science.

Although neighborhoods were destroyed by Monday's tornado, the community of Moore, Okla., has come together. "CBS This Morning" co-host Norah O'Donnell tells of the inspiring stories that have emerged following the storm.

When tornado sirens ring, residents are told to take cover, but storm chasers go towards the trouble. Troy Roberts shares the story of Kevin Rolffs, Colt Forney and Lauren Hill. These three ran towards the storm in Moore, Okla and captured some of the most striking images of the cyclone.

Worker's searched through what was left of Plaza Towers Elementary school which was demolished by the tornado in Moore, Okla. Anna Werner shares the story of the school's survivors.

The tornado that struck Moore, Okla., proved Mother Nature does not discriminate. Scott Pelley reports on the poignant images captured in the tornado's aftermath.

The man who led the IRS for five years spoke publicly for the first time about the singling out of conservative groups that took place on his watch. Douglas Shulman assured Congress last March that groups were not being targeted based on political persuasion. Nancy Cordes reports.