This photo of the B-29 Superfortress "Fifi", one of only two flyable aircraft of the type, was taken at the 2016 California Capital Airshow. It was one of the warbirds which participated in the 75th Anniversary of Pearl Harbor Tribute. The skies were patchy and alternated between sunny and clear to cloudy and rainy throughout the show. This is how I imagine a bomber would look like flying over stormy weather or smoke while on a mission in World War II.