Report: al Qaeda changing communication tactics after last month's intel leak

Al Qaeda has gone quiet.

When U.S. intelligence intercepted messages last month between al Qaeda's leader Ayman al-Zawahri and the head of Yemen's al Qaeda, it was seen as a major break in thwarting an imminent terrorist attack. Officials have said they thwarted the biggest single plot since 9-11.

But now there are major consequences, as al Qaeda is leaving US intelligence guessing and scrambling. Our Pentagon correspondent Chris Lawrence is OutFront.