We know that al Qaeda in the Arabian Peninsula has some very dangerous, very important leaders who are tied directly to the top leadership of al Qaeda central, including a man who was formerly Osama bin Laden's secretary.

On one level, bombing ISIS is easy. The U.S. knows where the group operates. There's no need for a ten-year hunt like the one for Osama bin Laden. The terror group has two capital cities: Mosul in Iraq and Raqqa in Syria. Al-Qaeda never had such an obvious home address.

Al Qaeda in the Arabian Peninsula is the largest external operation force within al Qaeda.

Some Iraqi troops aren't willing to fight for their government. But many Shiites appear willing to fight for their religious leaders.

In October 2008, American commandos launched a cross-border raid into Syria to capture an Islamic militant known as Abu Ghadiya. He was accused of being one of al Qaeda in Iraq's main smugglers of fighters and money between Iraq and Syria.

ISIS has leadership, just like al Qaeda has leadership. It's important to be able to eliminate the individuals that are leading the organization.