See https://www.youtube.com/watch?v=f3yaB6QJReo for video of the B-1 with Doug Benefield shortly before the fatal crash.

From http://findagrave.com/cgi-bin/fg.cgi?page=gr&GRid=126101552

Col Tommie Douglas "Doug" Benefield

Birth:  Feb. 15, 1929
Texas, USA
Death:  Aug. 29, 1984 (B-1 crash)
San Bernardino County
California, USA
Inscription:  International Test Pilot
Burial:
Oakwood Cemetery
Jefferson
Marion County
Texas, USA