Terror Investigation, Gun Policies, San Francisco Police Shooting, The Big Idea: Curing HIV/AIDS

Terror Investigation
Today the FBI announced that it is investigating the San Bernardino massacre as an act of terrorism. Law enforcement agents said the suspects, Syed Rizwan Farook, and his wife, Tashfeen Malik, had been in telephonic contact with other possible terror suspects in the United States.

Thuy Vu interviews Rep. Eric Swalwell, a member of the House Permanent Select Committee on Intelligence, about the influence of ISIS.

Gun Policies
Law enforcement officials say the weapons used in the San Bernardino massacre were purchased legally.

The incident was the worst mass shooting in the United States this year. Fourteen people were killed, and another 21 were injured. Most of the victims worked for San Bernardino County.

The shootings have amplified calls for tighter restrictions on gun purchases, but there is resistance by some lawmakers to change existing laws. Stanford law professor John Donohue joins Thuy Vu to discuss gun policies.

San Francisco Police Shooting
The San Francisco Police Department is facing intense scrutiny following an officer-involved shooting on Wednesday. At least three witnesses captured the incident on their cellphone cameras. The videos, taken from different angles, show several officers with their weapons aimed at 26-year-old Mario Woods, who police say was carrying a knife. KQED News reporter Alex Emslie joins Thuy Vu to talk about the investigation.

The Big Idea: Curing HIV/AIDS
Researchers at UC San Francisco say a new approach called "Shock and Kill" could lead to a cure for HIV. On Monday, those scientists received a $20 million grant from amFAR, The Foundation for AIDS Research, to test that approach. Thuy Vu interviews Dr. Paul Volberding, who has dedicated his career to ending HIV and is directing the research.