2 more U.S. troops killed by Afghan allies

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.

Glenn Lewis, the mayor of Moore, Okla., was there in 1999 when another tornado devastated the city. He speaks to Scott Pelley about how the town will rebuild following Monday's disaster.

Some of the most powerful images of children being rescued from Plaza Tower Elementary school were captured by Associated Press photographer Sue Ogrocki. Elaine Quijano reports on her story.

President Barack Obama told the people of Moore, Okla., that their country would be there for them for as long as it takes. More than 150 federal emergency personnel are in Oklahoma to help those in need. Major Garrett reports.

CBS News weather consultant David Bernard explains where extreme weather is headed next.