Panetta said Libyan officials have made a "strong effort" to improve security.

U.S. embassies throughout the Middle East and beyond have become the target of at least 20 protests.

The drones have come after U.S. Marines' deployment to Libya.

Officials have determined that the attack was planned in two-parts.

Information on the permit will likely become public other ways, expert says.

With pro-Western leaders in Libya, Obama will have to cooperate.