U.S. doctors purchasing unapproved foreign drugs

For several months now, CBS News Chief Investigative Correspondent Armen Keteyian has been following the growing trend of counterfeit cancer drugs that are ending up at U.S. doctors' office. Now Keteyian's latest report for "The CBS Evening News" is about American doctors purchasing foreign drugs that do not have the FDA seal of approval. He interviews a person who works at a clinic that has purchased these unapproved drugs for years.

"I've seen when patients suffer," said the clinic employee. "They suffer enough when they get diagnosed, when they are initially told that they have cancer. This adds a level of anxiety now and I don't think any patient should be forced to deal with that."

Read Keteyian's new report and watch the segment from "The CBS Evening News." And also check out his previous reporting on counterfeit cancer drugs from overseas.