New evidence on Zimmerman's injuries

The state of Oklahoma has often had the bad luck of being in the headlines for tragedies caused by both man and nature. The city of Moore itself has experienced four tornadoes since 1998. Richard Schlesinger reports on the strength of this state.

Barthels was in her bathtub when her two-story home collapsed on top of her during Monday's tornado in Moore, Okla. Stan Bush reports on her story.

Around 60 people were still hospitalized Tuesday with injuries they sustained when the tornado plowed through Moore, Okla. Scott Pelley talks to Dr. David Hogan, who helped treat many of the patients who were rushed to his hospital Monday night.

The difference between survival and death during a tornado can be helped by increased warning time. The National Weather Service says the ability to forecast a tornado system has advanced 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, who ran toward the storm in Moore, Okla., and captured some of the most striking images of the tornado.