8/28: Gulf Coast braces for Isaac; GOP nominates Mitt Romney for president at RNC

A section of the Riverside Bridge, which carries traffic along Interstate-5 near Seattle, collapsed after a truck hit an overhead beam, plunging vehicles into the Skagit River below; and "On the Road," Steve Hartman reports on three siblings who survived the Okla. tornado that destroyed their home and elementary school. But they said that's the only thing left in the house that matters is their dog. actually, change Riverside Bridge in the dek for "I-5"

Warning of the danger of keeping America on a "perpetual wartime footing," President Obama called for an end to the war on terror; and, With a tornado and a baby on the way, doctors and nurses at the Moore Medical Center really had to deliver.

The sight of the damage caused by Monday's tornado was almost more than some survivors could bear; Also, Lois Lerner, the IRS manager at the heart of the political targeting scandal, delivered an opening statement Wednesday before a congressional committee, but she refused to take any lawmakers' questions; And, Many American clothes come from factories in Bangladesh, which has a history of workplace disasters.

Workers searched through what was left of Plaza Towers Elementary School, which was demolished by the tornado in Moore, Okla. As Anna Werner reports, in many neighborhoods, there isn't much left to salvage; Also, although neighborhoods were destroyed by Monday's tornado, the community of Moore, Okla., has come together; And, 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.

David and Anna Friess lost almost all of their possessions in Monday's tornado, but they could have lost more, if not for a last-minute decision; Also, a tour of neighborhoods in Moore, Okla., reveals many homes weren't just damaged by Monday's massive tornado - they were destroyed; And, one resident of Moore, Okla., lost her home to a tornado for a second time Monday.

The twister that plowed through Moore, Okla., injured more than 300 people and caused at least 24 deaths ; Also, a third-grade teacher at Plaza Tower Elementary School in Moore, Okla., did everything she could to save her students; And, 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.