Curve Ball - Bob Simon interviews the Iraqi defector code-named "Curve Ball" - first identified by 60 MINUTES three years ago - whose false tale of a mobile, biological weapons program was the chief justification for invading Iraq. Draggan Mihailovich is the producer. Counterfeit Drugs - 60 MINUTES' nine-month investigation of counterfeit prescription drugs reveals how the dangerous and sometimes deadly fakes get into the nation's drug pipeline. Dr. Sanjay Gupta reports. Kyra Darnton, Sam Hornblower and Michael Radutzky are the producers. The $125,000 Question - Katie Couric reports on an experimental New York City charter school founded on the idea of hiring the best teachers by paying them $125,000, while denying them tenure. Jenny Dubin is the producer.