Astronaut William Thornton helps crewmember performs repairs on DDM

51B-03-037 (29 April-6 May 1985) --- Astronaut William E. Thornton (center frame), mission specialist, lends a helping hand to payload specialist Taylor G. Wang (partially visible at left) involved in serious repair work on the Drop Dynamics Module (DDM), an experiment of which he is principal investigator. The troubleshooting paid off and Dr. Wang later resumed studies with drop dynamics. Astronaut Don L. Lind, mission specialist, is in the background.