Rise of ISIS: Why the Stakes Couldn't Be Higher

The Islamic State (ISIS), the wealthiest and most lethal terrorist group in history, is making its presence known on the world stage in a gruesome way.

From beheadings to crucifixions to mass executions to a wave of anti-Christian persecution, the jihadist army has cut a bloody path across the Middle East, taking over large parts of Iraq and Syria.

Jay Sekulow, chief counsel for the American Center for Law and Justice, says they won't stop there, calling them the greatest threat America has faced since 9/11.

In his New York Times best-selling book, The Rise of ISIS: A Threat We Can't Ignore, Sekulow warns that if left unchecked, their existence could unleash a genocide of historic proportions.

"Even as our administration persists in its airpower-only approach, there are already signs that it is faltering, with ISIS maintaining its iron grip in northern and western Iraq," Sekulow told Christian Retailing magazine.

"The administration has committed America to a years-long fight, but years of half-measures won't defeat our enemy," he said.

What will happen if America does not defeat ISIS and do it quickly? Jay Sekulow answers that question and explains why there is still hope in the face of an unrelenting enemy, on The 700 Club, Sept. 16.