 Neither Walker 's body nor the wreck of his aircraft was found , and as of June 2013 it remains undiscovered . Walker was therefore listed on the Tablets of the Missing at Manila American Cemetery and Memorial , Philippines , where servicemen missing in action or buried at sea in the Southwest Pacific are commemorated . On 7 December 2001 , a headstone marker was erected in Section MC @-@ 36M of Arlington National Cemetery to give family members a place to gather in the United States . 
