sentences:  Fokker Aircraft Company of America became a subsidiary of General Motors Corporation which acquired a 40 percent holding in May 1929, but ended operations the following year as a combination of the effect of the Great Depression and bad publicity surrounding the 1931 crash of a Transcontinental & Western Air Fokker F.10 that killed celebrated football coach Knute Rockne.Fokker ended his association with the American company in 1931.GMC renamed their aviation subsidiary General Aviation Manufacturing Corporation, which in turn became part of North American Aviation, Inc in 1934.