Counterterrorism expert Daniel L. Byman says Hezbollah is "the most powerful single political movement in Lebanon" and remains a potent guerrilla force.

Gary Sick, a longtime expert on Iran, says both the Iranian and U.S. governments face pressure to compromise and allow talks on Tehran’s nuclear program to move forward.

The United States should cripple the Syrian government’s ability to kill masses of its own people and openly intensify its support to opposition forces, says expert Frederic C. Hof.

Syria’s breach of its treaty obligations has led to broad international support for U.S. military action, says CFR’s Lori Esposito Murray.