In an extremely unusual airstrike, the U.S. dropped bombs Sunday in central Mosul, Iraq, destroying a building containing huge amounts of cash ISIS was using to pay its troops and for ongoing operations, two U.S. defense officials told CNN. The officials could not say exactly how much money was there or in what currency, but one described it as "millions." Two 2,000 pound bombs destroyed the site quickly. But the longstanding impact may be even more significant. The officials said the U.S. plans to strike more financial targets like this one to take away ISIS's ability to function as a...