Why Are We Intervening in Syria?

A man walks past a burnt-out building in the Northern city of Latakia, some 350 km northwest Damascus on March 27, 2011.

The Obama administration reports that the chemical weapons "red line" in Syria has been crossed. Christiane Amanpour, chief international correspondent for CNN and global affairs anchor for ABC, discusses what comes next. Plus: elections in Iran and continued unrest in Turkey.