Junkers setbacks with crashes of prototypes in 1937 and 1938. Further refinements enabled certification in 1939 and spurred South African Airways to make an initial order for two aircraft fitted with US-built Pratt & Whitney engines. Just as the aircraft was being readied for its first commercial flights, World War II began. With the outbreak of hostilities, all models were requisitioned by the Luftwaffe for military air-transport roles, and later, long-range maritime patrol. Military aircraft production was begun by the company in the 1930s and eventually monopolized all its resources. Perhaps the most notable design was the Junkers Ju 87 "Stuka"
In the Aeroplane Over the Sea on its folk charm, "Aeroplane" is thin-blooded, woolgathering stuff." After completing a tour for "In the Aeroplane", Mangum disappeared from the public eye, tired of performing and explaining his lyrics. His bandmates were keen to capitalize on the album's success, but Mangum was not interested, and declined an offer to open for R.E.M. In the words of "Slate", "At the end of "Aeroplane"'s final song, you can hear Jeff Mangum [...] set down his guitar and walk off, and [...] that's exactly what Mangum did in real life." Subsequent reviews from "Pitchfork" and "Rolling Stone" were more positive; the latter