National Guard helicopters dropped thousands of used Christmas trees into Bayou Sauvage National Wildlife Refuge marshlands in New Orleans East this week. It's part of a decades-long restoration effort. "For us, it was Christmas in March," Shelley Stiaes said. She's the manager of the 25,000-acre refuge, and has worked there 19 years.Nearly 5,000 trees collected in New Orleans after Christmas were airlifted to select spots in wetlands and ponds. The trees act as a breakwater, protecting the city from storm surges and erosion, while also providing habitat for fish and other wildlife. The U.S. Fish and Wildlife Service says Bayou...