Building Water Tank on Barro Colorado, by Unknown, c. 1940s, Smithsonian Archives - History Div, James Zetek, director of the Canal Zone Biological Area, Francisco "Chi Chi" Vitola, chief of the labor force, and Smithsonian Secretary Alexander Wetmore standing in front of construction of a new water tank on Barro Colorado Island in the Panama Canal watershed. The CZBA is now the Smithsonian Tropical Research. Institute..