CURVE BALL - Bob Simon's investigation offers the most complete portrait -- including his identity and video of him -- of the Iraqi defector known as "Curve Ball," whose fabricated story of mobile biological weapons drove the U.S. argument for invading Iraq. Draggan Mihailovich is the producer.

IVORY WAR - Correspondent Scott Pelley goes to Africa to see firsthand the endangered elephant herds and confront the careless poachers who slaughter them for their ivory tusks. Jenny Dubin and Solly Granatstein are the producers.

CAPTAIN OF CAPITALISM - Lesley Stahl profiles Tom Perkins, a Silicon Valley venture capitalist and former Hewlett-Packard director whose mega yacht is the biggest sailboat in the world. Richard Bonin is the producer.