 Walker 's marriage ended in divorce in 1934 , after he had an affair . He remarried and had a son named John , but his second marriage also ended in divorce . Walker graduated from the Command and General Staff School in June 1935 and was posted to Hamilton Field , first as Intelligence and Operations Officer of the 7th Bombardment Group , and then as commander of the 9th Bombardment Squadron . While landing a Martin B @-@ 12 bomber , he overshot the runway . The station commander , Brigadier General Henry Arnold reported that Walker , " supposed to be one of our best pilots , apparently cuts out completely , uses up 4 @,@ 000 feet ( 1 @,@ 200 m ) and finally hits a concrete block and spoils a perfectly good airplane when he normally would have given her the gun and gone around again . " After fifteen years in the rank , jokes circulated about his being the most senior first lieutenant in the Air Corps , but he was finally promoted to captain on 1 August 1935 . He was temporary major from 20 October 1935 to 16 June 1936 , and again on 4 October 1938 , before the rank finally became substantive on 1 July 1940 . He had another accident in 1937 , when he crashed a B @-@ 17 on take off from Denver Municipal Airport but this time his flying skills were credited with saving the entire crew of nine from injury . 
