BROOKE WALK Defense Secretary Robert M. Gates walks with Army Brig. Gen. Joseph Caravalho after touring the Brooke Army Medical Center, Texas, June 30, 2010. Gates toured the medical center and awarded wounded warriors with Purple Hearts for their combat injuries. SHARE: Download: Full Size (0.07 MB) Credit: VIRIN: 026742-J-IIU95-550.jpg Photo Gallery