Aircraft, C-123 on Bien Hoa runway viewed as we drove by.

The Fairchild C-123 Provider
"By 1962, the C-123K variant aircraft was evaluated for operations in Southeast Asia and their stellar performance led the Air Force to upgrade 180 of the C-123B aircraft to the new C-123K standard, which featured auxiliary jet pods underneath the wings, and anti-skid brakes."
Source: http://en.wikipedia.org/wiki/Fairchild_C-123_Provider