Mortar strikes highlight rebel advances in Syria

The civil war in Syria hit President Bashar Assad's doorstep on Tuesday, when two mortars exploded near one of his palaces in Damascus.

Syria's state news service did not report any casualties, and it's unclear if Assad was inside (he owns two more palaces in the city), but the strike is the first in Assad's safe zone and another sign that rebels keep advancing.

Col. Douglas Macgregor (U.S. Army, retired) discussed that and other top defense issues with Capital Insider.