Sometimes bronchoscopy is used to treat lung problems. It may be done to insert a stent in an airway. An airway stent is a small tube that holds the airway open. It's used when a tumor or other condition blocks an airway. In children, the procedure most often is used to remove something blocking an airway.
Spanning the border from Minnesota into the Canadian provinces of Ontario and Manitoba, Lake of the Woods is an enormous body of water over 68 miles long, 59 miles wide, with 25,000 miles of shoreline-the world's longest lake shoreline.
Related: World's Largest Lake. The deepest lake in the United States is Crater Lake, a volcanic crater in southern Oregon. It's deepest measured depth is 1,932 feet (589 meters). It is the seventh deepest lake in the world.