An Illinois community mourns four students killed in a crash at school. Also, Dr. Jon LaPook shares new clinical trial results showing how immunotherapy could help cancer patients avoid toxic treatments like chemotherapy, radiation and surgery.
U.S. officials say they have not established a direct link between the suspect in Iraq and the man who carried out the New Year's attack on Bourbon Street that killed 14 people.
The three children and one teenager killed when a car crashed into an after-school program in downstate Chatham, Illinois, have been identified. The driver has also been identified.
