National

According to a study by Initial Washroom Hygiene, handbags have up to ten times the level of microbiological activity on them than an average toilet seat. Willem Marx reports from London.

During rush hour in Connecticut, two commuter trains collided, sending 72 passengers to the hospital. The tracks are now closed while the NTSB investigates. And as Don Dahler reports, it's creating a travel nightmare; And, after his close friend died from pancreatic cancer, 16-year-old Jack Andraka unleashed his hyper-drive intellect on preventing more

Web Extra: Following a close friends death from pancreatic cancer, 16-year-old Jack Andraka created a much faster and far cheaper detection method for pancreatic, ovarian and lung cancer. Jim Axelrod speaks with the teen innovator about his favorite awards.

Parts of the plains and Midwest are under the threat of severe weather, including possible tornadoes. Jim Axelrod speaks with CBS News weather consultant David Bernard about what to expect in the coming days.

The town of Granbury, Texas, was hit hardest by a string of 16 deadly tornadoes that struck the state. Anna Werner reports how the city's "Code Red" warning system helped kept residents alive.

Excitement is growing as the drawing nears for the record-setting Powerball jackpot. Carter Evans reports from California, the latest player to join the multi-state lottery, where residents are buying up 10,000 tickets every minute.

After his close friend died from pancreatic cancer, 16-year-old Jack Andraka unleashed his hyper-drive intellect on preventing more cancer deaths. And as Jim Axelrod reports, the teen created a much faster and far cheaper detection method for pancreatic, ovarian and lung cancer.

The Federal Bureau of Prisons is reviewing the frequency and fairness of solitary confinement in all federal prisons. A rollback on "solitary" is already underway in some states. Randall Pinkston reports on the impact the rollback is having on Mississippi.

During rush hour in Connecticut, two commuter trains collided, sending 72 passengers to the hospital. The tracks are now closed while the NTSB investigates. And as Don Dahler reports, it's creating a travel nightmare.

New questions are being raised concerning if anyone in the White House was aware of IRS targeting of conservative groups. Margaret Brennan reports on the new evidence that's heating up the controversy.