THE PURGE - A Baghdad clergyman estimates that 90 percent of Iraq's Christians, once thought to number over a million, have either fled or have been murdered by Islamic extremists during the religious civil war. Scott Pelley reports. Shawn Efran and Philip Ittner are the producers.

ONE LAPTOP PER CHILD - MIT Prof. Nicholas Negroponte’s dream is to put a laptop computer into the hands of every child as an educational aid. Lesley Stahl reports on his progress in Cambodia and Brazil. Catherine Olian is the producer.

WILL SMITH - Steve Kroft profiles the versatile actor on the eve of his next film, "I Am Legend." John Hamlin and Albert Kahwaty are the producers.