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The oversight committees, particularly the HPSCI, became increasingly alarmed over the role US intelligence agencies were playing in the implementation of the administration's Central American policy. The issue of greatest concern was the CIA's support to the Contra rebels in Nicaragua.
Functions of the hair fiber and hair follicle. The main function of the hair follicle is to produce a hair shaft or fiber. The shaft is the physically visible portion of the hair and plays a significant role both biologically and psychologically. The hair shaft is composed of three parts â the cuticle, the cortex and the medulla.