Create a dramatic comic-style illustration showing D.B. Cooper, a mysterious man in a dark suit and sunglasses, boarding Northwest Orient Flight 305. The scene should depict Cooper calmly walking down the airplane aisle, with passengers glancing at him curiously. The background should include the airplane interior with dim lighting, emphasizing the enigmatic nature of Cooper. The composition should evoke a sense of intrigue and suspense, capturing the beginning of his legendary heist.