Syrian activists allege that Syrian President Bashar al Assad's regime used chemical weapons against rebels today, killing hundreds of civilians.
The allegations come just after United Nations chemical weapons experts arrived in the country to investigate earlier alleged uses of these weapons.
Amy Smithson of the James Martin Center for Nonproliferation Studies, explains what the U.N. team will be looking for and the challenges they face in determining chemical weapons use.
- Amy Smithson, senior fellow at the James Martin Center for Nonproliferation Studies.
This segment aired on August 21, 2013.