Breaking News from CBS

• Oxbow upsets Orb at Preakness Stakes, ruining Triple Crown bid

  Kentucky Derby winner's bid to capture Triple Crown ruined at Baltimore's Pimlico Race Course

• FBI searches apartment in ricin letter case

  Federal investigators have been searching for the person who sent the letters, which were postmarked Tuesday in Spokane

• Official: Broken rail eyed in Conn. train crash

  National Transportation Safety Board member said the broken rail is of substantial interest to investigators

• Video: Handbags have more germs than toilet seats, study finds

  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.

• Video: 5/18: NTSB investigates train collision; teen tackles cancer diagnosis

  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 cancer deaths. And as Jim Axelrod reports, the teen created a much faster and far cheaper detection method for pancreatic, ovarian and lung cancer.