Drones find Iowa hog lots

From high in the sky, satellites flying over Iowa detected 5,000 more pig confinements and cattle lots across the state.  That's 50-percent more than the state had previously known about.  The Iowa Department of Natural Tesources made the discovery through satellite imagery. Environmentalists say they're concerned because the state has no information about where millions of gallons of manure is going.  There's also stiff criticism that DNR isn't doing its job.