About 2,000 acres of land on the northeast part of Lake Texoma will be closed from 6:00 p.m. Friday through 6:00 p.m. Saturday, during a large search and rescue exercise. "It's very remote, so we're not taking over any of the actually recreation areas," National Association of Search and Rescue instructor Dion Petaros said. "This is all backwoods where people would not normally be walking. There's no lake access or boating or anything back there." Petaros said the focus of the exercise is on finding a lost person. "A woman who's a skilled field operator is pretending to be the subject. She will remain in the woods for the nex three days, as the management team tries to analyze what's going on and send teams out looking for her." Petaros says five aircraft, including Civil Air Patrol panes and medical helicopters will be used. "This is the first time we're doing an exercise of this scope in the state of Oklahoma," Petaros said.