A plane is any flat surface of two dimensions. Planes are usually represented by a parallelogram but extend infinitely in both dimensions. Imagine a piece of paper that keeps going. If two planes intersect, then they do so in exactly one line. But planes can be parallel. Planes contain an infinite number of points, but can be named by any three non-collinear points (cannot draw a line between them). Lines that intersect planes do so at a point (think of a piece of paper and a pencil).
If you are asked to describe the intersection of two planes, then describing a crash between two airplanes is not the answer and it just lets the teacher know that you have not listened to anything in class.
This cache is located near Curtiss Wright Hanger, the first building erected at Owens Field back in 1922. On April 24, 1930, the new municipal airport was dedicated as Owens Field. In celebration, an airshow with more than 15,000 people attending saw notable aviators like the President of the Curtiss Flying Service, Casey Jones, Bill Winston (the flying instructor of Charles Lindbergh), and Elliot White Springs. Famous patrons also include the Wright brothers, Amelia Earhart, and FDR. It was also once home to a WWII B-25C bomber named "Skunkie". This was a plane that was used for practice bombing runs and was ditched into Lake Greenwood on D-Day. It was restored in 1992 for a celebration of the Doolittle Raider's to learn more visit SC Historic Aviation. The hanger has been restored and is now a restaurant.
The cache is in a small pocket park adjacent to Owen's Field and near a bench with a good view of the hangar and decent view to the runway. You are looking for a magnetic nano.