A Korean apparel company has licensed the Lockheed Martin brand to sell clothing in Korea. This is part of a larger fashion trend in Korea where seemingly 'random' Western brands like CNN or Kodak are licensed by apparel companies
As fashion goes, it doesn't even qualify as odd imo. The website is just grasping for a story.
Because it's simply available as an option. National Geographic is licensed and marketed differently in Korea, so it's just sold as a regular brand in normal retail outlets. It's not really necessary to reach for sociological explanations when it's just random gear you pick up at eMart that happens to have the NG brand. See also brands like Jeep, Ttoma, Discovery Expedition, etc.
Like out of season Christmas and nursery rhymes in Asian elevators, but now with a toxic brand?