• Closing in on ISIS.

The group has lost all but 1 percent of the territory it held in Iraq and Syria. Now, American-backed forces, above, are moving to reclaim the last sliver of ISIS-held territory.

It has taken more than four years, over 29,000 airstrikes and thousands of soldiers’ lives for the coalition to get to this point.

But the group remains a potent threat: It still has thousands of fighters worldwide and a vast online reach.